ClinicalTrials.gg
CompletedNCT04515147Updated Sep 28, 2023Results posted

A Dose-Confirmation Study to Evaluate the Safety, Reactogenicity and Immunogenicity of Vaccine CVnCoV in Healthy Adults for COVID-19

A Phase 2 interventional study of CVnCoV 6 μg and CVnCoV 12 μg in Coronavirus, Covid19 and SARS-CoV-2, sponsored by CureVac. Completed at 2 sites in 2 countries. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-09-28.

Sponsored by CureVac (part of BioNTech SE) · Phase 2, Interventional, and Prevention

Phase
Phase 2
Study type
Interventional
Enrollment
668
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

This study aims to evaluate the safety and reactogenicity profile after 1 and 2 dose administrations of investigational SARS-CoV-2 mRNA vaccine (CVnCoV) at different dose levels and to evaluate the humoral immune response after 1 and 2 dose administrations of CVnCoV.

Read the detailed description

This clinical trial information was submitted voluntarily under the applicable law and, therefore, certain submission deadlines may not apply. (That is, clinical trial information for this applicable clinical trial was submitted under section 402(j)(4)(A) of the Public Health Service Act and 42 CFR 11.60 and is not subject to the deadlines established by sections 402(j)(2) and (3) of the Public Health Service Act or 42 CFR 11.24 and 11.44.).

02

Conditions studied

  • Coronavirus
  • Covid19
  • SARS-CoV-2
  • Severe Acute Respiratory Syndrome

Keywords

  • Vaccine
  • SARS
  • COVID
  • Safety
  • Reactogenicity
  • Immunogenicity
03

In context

Coronavirus Infections

1,112 studies on the registry are indexed under Coronavirus Infections; 52 are open to participants now.

This study's enrollment of 668 is above the median of 120 across 655 interventional studies indexed under Coronavirus Infections.

Browse Coronavirus Infections studies →

Lead sponsor

CureVac is the lead sponsor of 18 studies on the registry; none are open to participants now.

First submitted before CureVac became part of BioNTech SE.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Healthy male and female participants ≥18 years of age. A healthy participant is defined as an individual who is in good general health, according to the Investigator's assessment. Chronic health conditions are acceptable if the condition is considered well controlled with treatment according to the discretion of the Investigator.
  • Expected to be compliant with protocol procedures and available for clinical follow-up through the last planned visit.
  • Participants are able to understand and willing to provide .
  • Physical examination without findings according to the Investigator's assessment.
  • (BMI) ≥18.0 and ≤32.0 kg/m\^2.
  • Female participants of : at the time of enrollment, negative human chorionic gonadotropin (hCG) pregnancy test (serum) for female participants presumed to be of childbearing potential on the day of enrollment. On Day 1 (pre-vaccination): negative urine pregnancy test (required if serum pregnancy test was performed more than 3 days before).
  • Female participants of childbearing potential must use highly effective methods of from 2 weeks before the first administration of the trial vaccine until 3 months following the last administration. The following methods of birth control are considered highly effective when used consistently and correctly:

    • Combined (estrogen and progestogen containing) hormonal contraception associated with inhibition of ovulation (oral, intravaginal or transdermal);
    • Progestogen-only hormonal contraception associated with inhibition of ovulation (oral, injectable or implantable);
    • Intrauterine devices;
    • Intrauterine hormone-releasing systems;
    • Bilateral tubal occlusion;
    • Vasectomized partner;
    • Sexual abstinence (periodic abstinence [e.g., calendar, ovulation, symptothermal and post-ovulation methods] and withdrawal are not acceptable).
  • Male participants should be instructed not to get their partners pregnant until 3 months after the last administration.

Exclusion criteria

Exclusion Criteria:

  • Use of any or non-registered product (vaccine or drug) other than the trial vaccine within 28 days preceding the administration of the trial vaccine, or planned use during the trial period.
  • Receipt of any other vaccines within 28 days prior to enrollment in this trial or planned receipt of any vaccine within 28 days of trial vaccine administration (primary dose or booster dose).
  • Receipt of any investigational or licensed/authorized SARS-CoV-2 or other coronavirus vaccine prior to the administration of the trial vaccine.
  • Any treatment with or other immune-modifying drugs (including, but not limited to, , biologicals, and methotrexate) within 6 months prior to the administration of the trial vaccine or planned use during the trial, with the exception of topically-applied, inhaled, or intranasal steroids.
  • Use of hormonal therapy for gender reassignment.
  • Any medically diagnosed or suspected immunosuppressive or immunodeficient condition based on medical history and physical examination, including known infection, virus infection, and virus infection.
  • History of immune-mediated or disease.
  • History of angioedema (known C1 inhibitor deficiency).
  • History of anaphylaxis or allergy to any component of CVnCoV or aminoglycoside antibiotics.
  • History of or current alcohol and/or drug abuse.
  • Participants who are active smokers, were active smokers within the last year (including any vaping in the last year), or have a total smoking history ≥10 pack years. A pack year is calculated by multiplying the number of packs of cigarettes smoked per day by the number of years the person has smoked.
  • History of virologically-confirmed Severe Acute Respiratory Syndrome (SARS), Middle East Respiratory Syndrome (MERS), or COVID-19 disease or known exposure (without any personal protective equipment) to an individual with confirmed COVID-19 disease or SARS-CoV-2 infection within the past 2 weeks.
  • Administration of immunoglobulins and/or any blood products within the 3 months preceding the administration of any dose of the trial vaccine.
  • Presence or evidence of significant uncontrolled acute or chronic medical or psychiatric illness. Significant medical or psychiatric illnesses include but are not limited to:

    • Uncontrolled respiratory disease (e.g., , asthma), including use of the following asthma medications: intravenous corticosteroids, leukotriene modifiers, biologics.
    • Uncontrolled cardiovascular disease (e.g., congestive heart failure, cardiomyopathy, ischemic heart disease, history of stroke, peripheral artery disease, pulmonary embolism).
    • History of myocarditis or pericarditis as an adult.
    • Diabetes mellitus (insulin-dependent).
    • Uncontrolled neurological disorders or Guillain-Barré syndrome or history of seizure, except for febrile seizures during childhood.
    • Current or past , unless completely resolved without sequelae for >5 years.
  • Foreseeable non-compliance with protocol, as judged by the Investigator.
  • For female participants: pregnancy or lactation.
  • Participants with impaired coagulation or any bleeding disorder in whom an intramuscular injection or a blood draw is . This includes participants on treatment with anticoagulants (e.g., vitamin K antagonists, novel oral anticoagulants, and heparin). Use of aggregation inhibitors is not exclusionary.
  • Participants employed by the Sponsor, Investigator, or trial site, or relatives of research staff working on this trial.
  • Participants considered at the Investigator's discretion to be at increased risk of exposure to COVID-19 disease.
Terms in these criteria, in plain language(16)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

COPD

Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

05

Study design

Phase
Phase 2
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Sequential assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
668 participants (actual)

Study arms

  • Experimental
    Part 1, Group 1: CVnCoV 6 μg

    Participants will be vaccinated with CVnCoV on Day 1 and Day 29. Participants in this group will be aged between 18 and 60 years old.

    Biological: CVnCoV 6 μg

  • Experimental
    Part 1, Group 2: CVnCoV 6 μg

    Participants will be vaccinated with CVnCoV on Day 1 and Day 29. Participants in this group will be aged over 60 years old.

    Biological: CVnCoV 6 μg

  • Experimental
    Part 1, Group 3: CVnCoV 12 μg

    Participants will be vaccinated with CVnCoV on Day 1 and Day 29. Participants in this group will be between the ages of 18 to 60 years old. CVnCoV will be administered again as a booster vaccination on Day 180 in a sub-group of participants.

    Biological: CVnCoV 12 μg

  • Experimental
    Part 1, Group 4: CVnCoV 12 μg

    Participants will be vaccinated with CVnCoV on Day 1 and Day 29. Participants in this group will be aged over 60 years old. CVnCoV will be administered again as a booster vaccination on Day 57 or Day 180 in a sub-group of participants.

    Biological: CVnCoV 12 μg

  • Active comparator
    Part 1, Group 5: Hepatitis A vaccine

    Participants will be vaccinated with a hepatitis A vaccine on Day 1 and Day 29. Participants in this group will be aged between 18 and 60 years old.

    Biological: Hepatitis A vaccine

  • Active comparator
    Part 1, Group 6: Pneumococcal vaccine

    Participants will be vaccinated with a pneumococcal vaccine on Day 1 and Day 29. Participants in this group will be aged over 60 years old.

    Biological: Pneumococcal vaccine

  • Experimental
    Part 2, Group 1: CVnCoV 12 µg

    Participants will be vaccinated with CVnCoV 12 µg on Day 1 and Day 29. Participants in this group will be aged between 18 and 60 years old.

    Biological: CVnCoV 12μg

  • Active comparator
    Part 2, Group 2: Hepatitis A vaccine

    Participants will be vaccinated with a hepatitis A vaccine on Day 1 and Day 29. Participants in this group will be aged between 18 and 60 years old.

    Biological: Hepatitis A vaccine

  • Experimental
    Part 2, Group 3: CVnCoV 12 µg

    Participants will be vaccinated with CVnCoV 12 µg on Day 1 and Day 29. Participants in this group will be aged over 60 years old.

    Biological: CVnCoV 12μg

  • Active comparator
    Part 2, Group 4: Pneumococcal vaccine

    Participants will be vaccinated with a pneumococcal vaccine on Day 1 and Day 29. Participants in this group will be aged over 60 years old.

    Biological: Pneumococcal vaccine

Interventions

  • BiologicalCVnCoV 6 μg

    Participants will receive an intramuscular injection by needle in the deltoid area.

    Also known as: CV07050101

  • BiologicalCVnCoV 12 μg

    Participants will receive an intramuscular injection by needle in the deltoid area.

    Also known as: CV07050101

  • BiologicalHepatitis A vaccine

    Participants will receive an intramuscular injection by needle in the deltoid area.

  • BiologicalPneumococcal vaccine

    Participants will receive an intramuscular injection by needle in the deltoid area.

  • BiologicalCVnCoV 12μg

    Participants will receive an intramuscular injection by needle in the deltoid area.

    Also known as: CV07050101

06

What researchers measure

Primary outcomes

  1. Number of Participants Who Experienced a Solicited Adverse Event (AE) Occurring on the Day of Vaccination and the Following 7 Days After Dose 1 and Dose 2

    Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). By definition, all solicited local AEs occurring from the time of first vaccination were considered related to trial vaccination. For solicited systemic AEs, the Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

    Time frame: Up to 7 days after Dose 1 (Days 1 to 8) and Dose 2 (Days 29 to 36)

  2. Intensity of Solicited AEs Per US Food and Drug Administration (FDA) Toxicity Grading Scale Occurring on the Day of Vaccination and the Following 7 Days After Dose 1 and Dose 2

    Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). Intensity of solicited local AEs and solicited systemic AEs were graded per the FDA Toxicity Grading Scale at Grades 1-3, where higher grades indicate a worse outcome.

    Time frame: Up to 7 days after Dose 1 (Days 1 to 8) and Dose 2 (Days 29 to 36)

  3. Duration of Solicited AEs Occurring on the Day of Vaccination and the Following 7 Days After After Dose 1 and Dose 2

    Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). Duration is calculated as consecutive days with a respective solicited AE regardless of the grade of the AE. AEs ongoing after day 8 are included.

    Time frame: Up to 7 days after Dose 1 (Days 1 to 8) and Dose 2 (Days 29 to 36)

  4. Number of Participants Who Experienced an Unsolicited AE Occurring on the Day of Vaccination and the Following 28 Days After Dose 1 and Dose 2

    Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants received a prompt (by e.g., a phone call or text message) to verify whether the participants had any health concerns since the last visit. The Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

    Time frame: Up to 28 days after Dose 1 (Days 1 to 29) and Dose 2 (Days 29 to 57)

  5. Intensity of Unsolicited AEs Per the Investigator's Assessment Occurring on the Day of Vaccination and the Following 28 Days After Dose 1 and Dose 2

    Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants received a prompt (by e.g., a phone call or text message) to verify whether the participants had any health concerns since the last visit. The Investigator made an assessment of intensity for each AE reported during the trial and assigned it to one of the following categories: * Mild: an event that was easily tolerated by the participant, causing minimal discomfort and not interfering with everyday activities. * Moderate: an event that caused sufficient discomfort to interfere with normal everyday activities. * Severe: an event that prevented normal everyday activities.

    Time frame: Up to 28 days after Dose 1 (Days 1 to 29) and Dose 2 (Days 29 to 57)

  6. Number of Participants Who Experienced a Serious Adverse Event (SAE) During the Trial

    An SAE was defined as any untoward medical occurrence that, at any dose: * Resulted in death. * Was life-threatening. * Required inpatient hospitalization or prolongation of existing hospitalization. * Resulted in persistent disability/incapacity. * Was a congenital anomaly/birth defect in the offspring of the participant. * Was an important medical event. The Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

    Time frame: Up to Day 393

  7. Number of Participants Who Experienced an Adverse Event of Special Interest (AESI) During the Trial

    AESIs included: * AEs with a suspected immune-medicated etiology. * COVID-19 disease. * Other AEs relevant to SARS-CoV-2 vaccine development or the target disease. Participants who became unblinded and/or received a licensed/authorized vaccine were censored at the day after unblinding or at the day after receiving the licensed/authorized vaccine, whichever was earlier. The Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

    Time frame: Up to Day 393

  8. Percentage of Participants Seroconverting for SARS-CoV-2 Spike Protein Receptor-Binding Domain (RBD) Antibodies on Day 29 and Day 43

    As measured by enzyme-linked immunosorbent assay (ELISA). In participants not exposed to SARS-CoV-2 before the trial seroconversion was defined as any increase in titer in antibodies against SARS-CoV-2 RBD versus baseline. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/authorized vaccine.

    Time frame: Baseline, Day 29 and Day 43

  9. Geometric Mean Titers (GMTs) of SARS-CoV-2 Spike Protein RBD Antibodies on Day 29 and Day 43

    As measured by ELISA. The SARS-CoV-2 spike RBD protein-specific antibodies are expressed as GMT (geometric mean of reciprocal duplicate dilutions). Concentration/titers marked as below the lower limit of quantification (LLOQ) were arbitrary replaced by half of the LLOQ for GMT computations purpose. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/authorized vaccine.

    Time frame: Day 29 and Day 43

  10. Percentage of Participants Seroconverting for SARS-CoV-2 Neutralizing Antibodies on Day 29 and Day 43

    As measured by an activity assay. In participants not exposed to SARS-CoV-2 before the trial, seroconversion was defined as any increase in titer in SARS-CoV-2 neutralizing antibodies versus baseline. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/ authorized vaccine.

    Time frame: Baseline, Day 29 and Day 43

  11. GMTs of SARS-CoV-2 Neutralizing Antibodies on Day 29 and Day 43

    The SARS-CoV-2 neutralizing antibodies are expressed as GMT (geometric mean of reciprocal duplicate dilutions). Concentration/titers marked as below the lower limit of quantification (LLOQ) were arbitrary replaced by half of the LLOQ for GMT computations purpose. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/authorized vaccine.

    Time frame: Day 29 and Day 43

Secondary outcomes

  1. Number of Participants Who Experienced a Solicited Adverse Event (AE) Occurring on the Day of Booster Vaccination and the Following 7 Days

    Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). By definition, all solicited local AEs occurring from the time of first vaccination were considered related to trial vaccination. For solicited systemic AEs, the Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

    Time frame: Up to 7 days after booster vaccination (Days 57 to 64 and Days 180 to 187)

  2. Intensity of Solicited AEs Per FDA Toxicity Grading Scale Occurring on the Day of Booster Vaccination and the Following 7 Days

    Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). Intensity of solicited local AEs and solicited systemic AEs were graded per the FDA Toxicity Grading Scale at Grades 1-3, where higher grades indicate a worse outcome.

    Time frame: Up to 7 days after booster vaccination (Days 57 to 64 and Days 180 to 187)

  3. Duration of Solicited AEs Occurring on the Day of Booster Vaccination and the Following 7 Days

    Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). Duration is calculated as consecutive days with a respective solicited AE regardless of the grade of the adverse event.

    Time frame: Up to 7 days after booster vaccination (Days 57 to 64 and Days 180 to 187)

  4. Number of Participants Who Experienced an Unsolicited AE Occurring on the Day of Booster Vaccination and the Following 28 Days

    Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants received a prompt (by e.g., a phone call or text message) to verify whether the participants had any health concerns since the last visit. The Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

    Time frame: Up to 28 days after booster vaccination (Days 57 to 85 and Days 180 to 208)

  5. Intensity of Unsolicited AEs Per the Investigator's Assessment Occurring on the Day of Booster Vaccination and the Following 28 Days

    Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants received a prompt (by e.g., a phone call or text message) to verify whether the participants had any health concerns since the last visit. The Investigator made an assessment of intensity for each AE reported during the trial and assigned it to one of the following categories: * Mild: an event that was easily tolerated by the participant, causing minimal discomfort and not interfering with everyday activities. * Moderate: an event that caused sufficient discomfort to interfere with normal everyday activities. * Severe: an event that prevented normal everyday activities.

    Time frame: Up to 28 days after booster vaccination (Days 57 to 85 and Days 180 to 208)

  6. Percentage of Participants Seroconverting for SARS-CoV-2 Spike Protein RBD Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393

    As measured by ELISA. In participants not exposed to SARS-CoV-2 before the trial seroconversion was defined as any increase in titer in antibodies against SARS-CoV-2 RBD versus baseline. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/ authorized vaccine.

    Time frame: For participants who received the booster vaccination on Day 57: Baseline, Day 57, Day 85 and Day 180. For participants who received the booster vaccination on Day 180: Baseline, Day 180, Day 208 and Day 393

  7. GMTs of SARS-CoV-2 Spike Protein RBD Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393

    As measured by ELISA. The SARS-CoV-2 spike RBD protein-specific antibodies are expressed as GMT (geometric mean of reciprocal duplicate dilutions). Concentration/titers marked as below the lower limit of quantification (LLOQ) were arbitrary replaced by half of the LLOQ for GMT computations purpose. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/ authorized vaccine.

    Time frame: For participants who received the booster vaccination on Day 57: Day 57, Day 85 and Day 180. For participants who received the booster vaccination on Day 180: Day 180, Day 208 and Day 393

  8. Percentage of Participants Seroconverting for SARS-CoV-2 Neutralizing Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393

    As measured by an activity assay. In participants not exposed to SARS-CoV-2 before the trial, seroconversion was defined as any increase in titer in SARS-CoV-2 neutralizing antibodies versus baseline. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/authorized vaccine.

    Time frame: For participants who received the booster vaccination on Day 57: Baseline, Day 57, Day 85 and Day 180. For participants who received the booster vaccination on Day 180: Baseline, Day 180, Day 208 and Day 393

  9. GMTs of SARS-CoV-2 Neutralizing Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393

    As measured by an activity assay. The SARS-CoV-2 neutralizing antibodies are expressed as GMT (geometric mean of reciprocal duplicate dilutions). Concentration/titers marked as below the lower limit of quantification (LLOQ) were arbitrary replaced by half of the LLOQ for GMT computations purpose. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/ authorized vaccine.

    Time frame: For participants who received the booster vaccination on Day 57: Day 57, Day 85 and Day 180. For participants who received the booster vaccination on Day 180: Day 180, Day 208 and Day 393

07

Results

Posted Sep 28, 2023

Participant flow

This trial was performed in Peru and Panama between 21 September 2020 and 21 February 2022.

Participant flow — Overall Study
MilestoneCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Started12112892953130
Completed11102742682820
Not completed111527310
Withdrew: Withdrawal by subject10101818
Withdrew: Lost to follow-up015621
Withdrew: Adverse event000200
Withdrew: Miscellaneous000101

Outcome measures

PrimaryNumber of Participants Who Experienced a Solicited Adverse Event (AE) Occurring on the Day of Vaccination and the Following 7 Days After Dose 1 and Dose 2

Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). By definition, all solicited local AEs occurring from the time of first vaccination were considered related to trial vaccination. For solicited systemic AEs, the Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

Time frame:
Up to 7 days after Dose 1 (Days 1 to 8) and Dose 2 (Days 29 to 36)
Reported as:
Count of participants · Participants
Number of Participants Who Experienced a Solicited Adverse Event (AE) Occurring on the Day of Vaccination and the Following 7 Days After Dose 1 and Dose 2
ParticipantsCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Dose 1: Any solicited local AEs952532201726
Dose 1: Any solicited systemic AEs462291931314
Dose 1: Any related solicited systemic AEs452281901314
Dose 2: Any solicited local AEs93208188622
Dose 2: Any solicited systemic AEs982171951311
Dose 2: Any related solicited systemic AEs882171931311
PrimaryIntensity of Solicited AEs Per US Food and Drug Administration (FDA) Toxicity Grading Scale Occurring on the Day of Vaccination and the Following 7 Days After Dose 1 and Dose 2

Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). Intensity of solicited local AEs and solicited systemic AEs were graded per the FDA Toxicity Grading Scale at Grades 1-3, where higher grades indicate a worse outcome.

Time frame:
Up to 7 days after Dose 1 (Days 1 to 8) and Dose 2 (Days 29 to 36)
Reported as:
Count of participants · Participants
Intensity of Solicited AEs Per US Food and Drug Administration (FDA) Toxicity Grading Scale Occurring on the Day of Vaccination and the Following 7 Days After Dose 1 and Dose 2
ParticipantsCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Dose 1: Any solicited local AEs — Grade 1951912031625
Dose 1: Any solicited local AEs — Grade 200611711
Dose 1: Any solicited local AEs — Grade 3001000
Dose 1: Any solicited systemic AEs — Grade 144122122711
Dose 1: Any solicited systemic AEs — Grade 202966563
Dose 1: Any solicited systemic AEs — Grade 30011600
Dose 2: Any solicited local AEs — Grade 192166162517
Dose 2: Any solicited local AEs — Grade 201422515
Dose 2: Any solicited local AEs — Grade 3000100
Dose 2: Any solicited systemic AEs — Grade 17510010378
Dose 2: Any solicited systemic AEs — Grade 2211098363
Dose 2: Any solicited systemic AEs — Grade 3028900
PrimaryDuration of Solicited AEs Occurring on the Day of Vaccination and the Following 7 Days After After Dose 1 and Dose 2

Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). Duration is calculated as consecutive days with a respective solicited AE regardless of the grade of the AE. AEs ongoing after day 8 are included.

Time frame:
Up to 7 days after Dose 1 (Days 1 to 8) and Dose 2 (Days 29 to 36)
Reported as:
Mean · days
Duration of Solicited AEs Occurring on the Day of Vaccination and the Following 7 Days After After Dose 1 and Dose 2
daysCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Dose 1: Any solicited local AEs1.3 ± 0.501.2 ± 0.452.1 ± 1.121.8 ± 1.541.6 ± 0.872.0 ± 1.20
Dose 1: Any solicited systemic AEs1.5 ± 1.001.5 ± 0.841.9 ± 1.252.1 ± 1.421.9 ± 0.862.4 ± 2.17
Dose 2: Any solicited local AEs2.1 ± 1.272.3 ± 1.152.2 ± 1.111.9 ± 1.332.2 ± 1.172.2 ± 0.96
Dose 2: Any solicited systemic AEs2.1 ± 2.322.3 ± 2.431.9 ± 1.132.1 ± 1.492.2 ± 2.452.3 ± 2.05
PrimaryNumber of Participants Who Experienced an Unsolicited AE Occurring on the Day of Vaccination and the Following 28 Days After Dose 1 and Dose 2

Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants received a prompt (by e.g., a phone call or text message) to verify whether the participants had any health concerns since the last visit. The Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

Time frame:
Up to 28 days after Dose 1 (Days 1 to 29) and Dose 2 (Days 29 to 57)
Reported as:
Count of participants · Participants
Number of Participants Who Experienced an Unsolicited AE Occurring on the Day of Vaccination and the Following 28 Days After Dose 1 and Dose 2
ParticipantsCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Dose 1: Any unsolicited AEs5612010575
Dose 1: Any related unsolicited AEs21332601
Dose 2: Any unsolicited AEs437775107
Dose 2: Any related unsolicited AEs1213712
PrimaryIntensity of Unsolicited AEs Per the Investigator's Assessment Occurring on the Day of Vaccination and the Following 28 Days After Dose 1 and Dose 2

Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants received a prompt (by e.g., a phone call or text message) to verify whether the participants had any health concerns since the last visit. The Investigator made an assessment of intensity for each AE reported during the trial and assigned it to one of the following categories: * Mild: an event that was easily tolerated by the participant, causing minimal discomfort and not interfering with everyday activities. * Moderate: an event that caused sufficient discomfort to interfere with normal everyday activities. * Severe: an event that prevented normal everyday activities.

Time frame:
Up to 28 days after Dose 1 (Days 1 to 29) and Dose 2 (Days 29 to 57)
Reported as:
Count of participants · Participants
Intensity of Unsolicited AEs Per the Investigator's Assessment Occurring on the Day of Vaccination and the Following 28 Days After Dose 1 and Dose 2
ParticipantsCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Dose 1: Unsolicited AEs — Mild36948864
Dose 1: Unsolicited AEs — Moderate20211511
Dose 1: Unsolicited AEs — Severe005200
Dose 2: Unsolicited AEs — Mild41546391
Dose 2: Unsolicited AEs — Moderate0220916
Dose 2: Unsolicited AEs — Severe003300
PrimaryNumber of Participants Who Experienced a Serious Adverse Event (SAE) During the Trial

An SAE was defined as any untoward medical occurrence that, at any dose: * Resulted in death. * Was life-threatening. * Required inpatient hospitalization or prolongation of existing hospitalization. * Resulted in persistent disability/incapacity. * Was a congenital anomaly/birth defect in the offspring of the participant. * Was an important medical event. The Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

Time frame:
Up to Day 393
Reported as:
Count of participants · Participants
Number of Participants Who Experienced a Serious Adverse Event (SAE) During the Trial
ParticipantsCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Any SAEs018601
Any related SAEs000000
PrimaryNumber of Participants Who Experienced an Adverse Event of Special Interest (AESI) During the Trial

AESIs included: * AEs with a suspected immune-medicated etiology. * COVID-19 disease. * Other AEs relevant to SARS-CoV-2 vaccine development or the target disease. Participants who became unblinded and/or received a licensed/authorized vaccine were censored at the day after unblinding or at the day after receiving the licensed/authorized vaccine, whichever was earlier. The Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

Time frame:
Up to Day 393
Reported as:
Count of participants · Participants
Number of Participants Who Experienced an Adverse Event of Special Interest (AESI) During the Trial
ParticipantsCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Any AESIs13362373
Any related AESIs000100
PrimaryPercentage of Participants Seroconverting for SARS-CoV-2 Spike Protein Receptor-Binding Domain (RBD) Antibodies on Day 29 and Day 43

As measured by enzyme-linked immunosorbent assay (ELISA). In participants not exposed to SARS-CoV-2 before the trial seroconversion was defined as any increase in titer in antibodies against SARS-CoV-2 RBD versus baseline. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/authorized vaccine.

Time frame:
Baseline, Day 29 and Day 43
Reported as:
Number · percentage of participants
Percentage of Participants Seroconverting for SARS-CoV-2 Spike Protein Receptor-Binding Domain (RBD) Antibodies on Day 29 and Day 43
percentage of participantsCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Day 290 (0.0 to 26.5)10.0 (0.3 to 44.5)11.6 (7.8 to 16.4)7.8 (4.8 to 11.9)0 (0.0 to 14.2)4.3 (0.1 to 21.9)
Day 4383.3 (51.6 to 97.9)80.0 (44.4 to 97.5)93.9 (90.0 to 96.6)80.9 (75.2 to 85.7)0 (0.0 to 16.1)4.8 (0.1 to 23.8)
PrimaryGeometric Mean Titers (GMTs) of SARS-CoV-2 Spike Protein RBD Antibodies on Day 29 and Day 43

As measured by ELISA. The SARS-CoV-2 spike RBD protein-specific antibodies are expressed as GMT (geometric mean of reciprocal duplicate dilutions). Concentration/titers marked as below the lower limit of quantification (LLOQ) were arbitrary replaced by half of the LLOQ for GMT computations purpose. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/authorized vaccine.

Time frame:
Day 29 and Day 43
Reported as:
Geometric mean · titers
Geometric Mean Titers (GMTs) of SARS-CoV-2 Spike Protein RBD Antibodies on Day 29 and Day 43
titersCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Day 2950.000 ± 1.000057.154 ± 1.526467.221 ± 2.662463.828 ± 2.600556.724 ± 1.543452.112 ± 1.2195
Day 43462.744 ± 3.4299464.788 ± 4.29691733.125 ± 4.2886552.782 ± 5.120857.455 ± 1.566362.667 ± 2.8146
PrimaryPercentage of Participants Seroconverting for SARS-CoV-2 Neutralizing Antibodies on Day 29 and Day 43

As measured by an activity assay. In participants not exposed to SARS-CoV-2 before the trial, seroconversion was defined as any increase in titer in SARS-CoV-2 neutralizing antibodies versus baseline. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/ authorized vaccine.

Time frame:
Baseline, Day 29 and Day 43
Reported as:
Number · percentage of participants
Percentage of Participants Seroconverting for SARS-CoV-2 Neutralizing Antibodies on Day 29 and Day 43
percentage of participantsCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Day 290 (0.0 to 26.5)0 (0.0 to 30.8)8.3 (4.7 to 13.4)7.8 (4.1 to 13.2)0 (0.0 to 21.8)0 (0.0 to 20.6)
Day 4366.7 (34.9 to 90.1)70.0 (34.8 to 93.3)86.4 (80.5 to 91.1)77.1 (69.6 to 83.5)0 (0.0 to 24.7)0 (0.0 to 21.8)
PrimaryGMTs of SARS-CoV-2 Neutralizing Antibodies on Day 29 and Day 43

The SARS-CoV-2 neutralizing antibodies are expressed as GMT (geometric mean of reciprocal duplicate dilutions). Concentration/titers marked as below the lower limit of quantification (LLOQ) were arbitrary replaced by half of the LLOQ for GMT computations purpose. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/authorized vaccine.

Time frame:
Day 29 and Day 43
Reported as:
Geometric mean · titers
GMTs of SARS-CoV-2 Neutralizing Antibodies on Day 29 and Day 43
titersCVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 Years
Day 295.000 ± 1.00005.000 ± 1.00005.912 ± 2.01066.234 ± 2.47235.000 ± 1.00005.000 ± 1.0000
Day 4316.339 ± 3.671620.705 ± 2.899350.298 ± 4.017526.848 ± 3.95175.000 ± 1.00005.000 ± 1.0000
SecondaryNumber of Participants Who Experienced a Solicited Adverse Event (AE) Occurring on the Day of Booster Vaccination and the Following 7 Days

Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). By definition, all solicited local AEs occurring from the time of first vaccination were considered related to trial vaccination. For solicited systemic AEs, the Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

Time frame:
Up to 7 days after booster vaccination (Days 57 to 64 and Days 180 to 187)
Reported as:
Count of participants · Participants
Number of Participants Who Experienced a Solicited Adverse Event (AE) Occurring on the Day of Booster Vaccination and the Following 7 Days
ParticipantsCVnCoV 12 μg: Aged >60 Years - Day 57 BoosterCVnCoV 12 μg: Aged 18-60 Years - Day 180 BoosterCVnCoV 12 μg: Aged >60 Years - Day 180 Booster
Any solicited local AEs152412
Any solicited systemic AEs15248
Any related solicited systemic AEs15248
SecondaryIntensity of Solicited AEs Per FDA Toxicity Grading Scale Occurring on the Day of Booster Vaccination and the Following 7 Days

Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). Intensity of solicited local AEs and solicited systemic AEs were graded per the FDA Toxicity Grading Scale at Grades 1-3, where higher grades indicate a worse outcome.

Time frame:
Up to 7 days after booster vaccination (Days 57 to 64 and Days 180 to 187)
Reported as:
Count of participants · Participants
Intensity of Solicited AEs Per FDA Toxicity Grading Scale Occurring on the Day of Booster Vaccination and the Following 7 Days
ParticipantsCVnCoV 12 μg: Aged >60 Years - Day 57 BoosterCVnCoV 12 μg: Aged 18-60 Years - Day 180 BoosterCVnCoV 12 μg: Aged >60 Years - Day 180 Booster
Any solicited local AEs — Grade 114189
Any solicited local AEs — Grade 2153
Any solicited local AEs — Grade 3010
Any solicited systemic AEs — Grade 113116
Any solicited systemic AEs — Grade 22122
Any solicited systemic AEs — Grade 3010
SecondaryDuration of Solicited AEs Occurring on the Day of Booster Vaccination and the Following 7 Days

Solicited local AEs (injection site pain, redness, swelling, and itching) and solicited systemic AEs (fever, headache, fatigue, chills, myalgia, arthralgia, nausea/vomiting, and diarrhea) were recorded on the day of vaccination and the following 7 days using a diary (electronic or paper). Duration is calculated as consecutive days with a respective solicited AE regardless of the grade of the adverse event.

Time frame:
Up to 7 days after booster vaccination (Days 57 to 64 and Days 180 to 187)
Reported as:
Mean · days
Duration of Solicited AEs Occurring on the Day of Booster Vaccination and the Following 7 Days
daysCVnCoV 12 μg: Aged >60 Years - Day 57 BoosterCVnCoV 12 μg: Aged 18-60 Years - Day 180 BoosterCVnCoV 12 μg: Aged >60 Years - Day 180 Booster
Any solicited local AEs1.7 ± 0.802.0 ± 1.531.6 ± 0.79
Any solicited systemic AEs2.8 ± 2.182.0 ± 1.712.0 ± 2.07
SecondaryNumber of Participants Who Experienced an Unsolicited AE Occurring on the Day of Booster Vaccination and the Following 28 Days

Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants received a prompt (by e.g., a phone call or text message) to verify whether the participants had any health concerns since the last visit. The Investigator assessed the relationship between trial vaccine and each occurrence of each AE.

Time frame:
Up to 28 days after booster vaccination (Days 57 to 85 and Days 180 to 208)
Reported as:
Count of participants · Participants
Number of Participants Who Experienced an Unsolicited AE Occurring on the Day of Booster Vaccination and the Following 28 Days
ParticipantsCVnCoV 12 μg: Aged >60 Years - Day 57 BoosterCVnCoV 12 μg: Aged 18-60 Years - Day 180 BoosterCVnCoV 12 μg: Aged >60 Years - Day 180 Booster
Any unsolicited AEs762
Any related unsolicited AEs142
SecondaryIntensity of Unsolicited AEs Per the Investigator's Assessment Occurring on the Day of Booster Vaccination and the Following 28 Days

Diaries were used for collection of unsolicited AEs on each vaccination day and the following 28 days. In addition, participants received a prompt (by e.g., a phone call or text message) to verify whether the participants had any health concerns since the last visit. The Investigator made an assessment of intensity for each AE reported during the trial and assigned it to one of the following categories: * Mild: an event that was easily tolerated by the participant, causing minimal discomfort and not interfering with everyday activities. * Moderate: an event that caused sufficient discomfort to interfere with normal everyday activities. * Severe: an event that prevented normal everyday activities.

Time frame:
Up to 28 days after booster vaccination (Days 57 to 85 and Days 180 to 208)
Reported as:
Count of participants · Participants
Intensity of Unsolicited AEs Per the Investigator's Assessment Occurring on the Day of Booster Vaccination and the Following 28 Days
ParticipantsCVnCoV 12 μg: Aged >60 Years - Day 57 BoosterCVnCoV 12 μg: Aged 18-60 Years - Day 180 BoosterCVnCoV 12 μg: Aged >60 Years - Day 180 Booster
Mild652
Moderate100
Severe010
SecondaryPercentage of Participants Seroconverting for SARS-CoV-2 Spike Protein RBD Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393

As measured by ELISA. In participants not exposed to SARS-CoV-2 before the trial seroconversion was defined as any increase in titer in antibodies against SARS-CoV-2 RBD versus baseline. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/ authorized vaccine.

Time frame:
For participants who received the booster vaccination on Day 57: Baseline, Day 57, Day 85 and Day 180. For participants who received the booster vaccination on Day 180: Baseline, Day 180, Day 208 and Day 393
Reported as:
Number · percentage of participants
Percentage of Participants Seroconverting for SARS-CoV-2 Spike Protein RBD Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393
percentage of participantsCVnCoV 12 μg: Aged >60 Years - Day 57 BoosterCVnCoV 12 μg: Aged 18-60 Years - Day 180 BoosterCVnCoV 12 μg: Aged >60 Years - Day 180 Booster
Day 5782.1 (63.1 to 93.9)——
Day 85100 (86.3 to 100)——
Day 180100 (83.9 to 100)90.5 (69.6 to 98.8)69.2 (38.6 to 90.9)
Day 208—100 (83.2 to 100)100 (69.2 to 100)
Day 393—100 (2.5 to 100)—
SecondaryGMTs of SARS-CoV-2 Spike Protein RBD Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393

As measured by ELISA. The SARS-CoV-2 spike RBD protein-specific antibodies are expressed as GMT (geometric mean of reciprocal duplicate dilutions). Concentration/titers marked as below the lower limit of quantification (LLOQ) were arbitrary replaced by half of the LLOQ for GMT computations purpose. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/ authorized vaccine.

Time frame:
For participants who received the booster vaccination on Day 57: Day 57, Day 85 and Day 180. For participants who received the booster vaccination on Day 180: Day 180, Day 208 and Day 393
Reported as:
Geometric mean · titers
GMTs of SARS-CoV-2 Spike Protein RBD Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393
titersCVnCoV 12 μg: Aged >60 Years - Day 57 BoosterCVnCoV 12 μg: Aged 18-60 Years - Day 180 BoosterCVnCoV 12 μg: Aged >60 Years - Day 180 Booster
Day 57516.198 ± 4.6157——
Day 852889.963 ± 2.9473——
Day 1801449.055 ± 2.1869445.661 ± 3.1744153.160 ± 2.8146
Day 208—10094.652 ± 2.10204153.249 ± 2.2450
Day 393—915.460 ± NA—
SecondaryPercentage of Participants Seroconverting for SARS-CoV-2 Neutralizing Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393

As measured by an activity assay. In participants not exposed to SARS-CoV-2 before the trial, seroconversion was defined as any increase in titer in SARS-CoV-2 neutralizing antibodies versus baseline. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/authorized vaccine.

Time frame:
For participants who received the booster vaccination on Day 57: Baseline, Day 57, Day 85 and Day 180. For participants who received the booster vaccination on Day 180: Baseline, Day 180, Day 208 and Day 393
Reported as:
Number · percentage of participants
Percentage of Participants Seroconverting for SARS-CoV-2 Neutralizing Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393
percentage of participantsCVnCoV 12 μg: Aged >60 Years - Day 57 BoosterCVnCoV 12 μg: Aged 18-60 Years - Day 180 BoosterCVnCoV 12 μg: Aged >60 Years - Day 180 Booster
Day 5775.0 (55.1 to 89.3)——
Day 8596.0 (79.6 to 99.9)——
Day 18057.1 (34.0 to 78.2)28.6 (11.3 to 52.2)7.7 (0.2 to 36.0)
Day 208—100 (83.2 to 100)90.0 (55.5 to 99.7)
Day 393—100 (2.5 to 100)—
SecondaryGMTs of SARS-CoV-2 Neutralizing Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393

As measured by an activity assay. The SARS-CoV-2 neutralizing antibodies are expressed as GMT (geometric mean of reciprocal duplicate dilutions). Concentration/titers marked as below the lower limit of quantification (LLOQ) were arbitrary replaced by half of the LLOQ for GMT computations purpose. Participants who received a licensed/authorized vaccine were censored at the day after receiving the licensed/ authorized vaccine.

Time frame:
For participants who received the booster vaccination on Day 57: Day 57, Day 85 and Day 180. For participants who received the booster vaccination on Day 180: Day 180, Day 208 and Day 393
Reported as:
Geometric mean · titers
GMTs of SARS-CoV-2 Neutralizing Antibodies on Day 57, Day 85, Day 180, Day 208 and Day 393
titersCVnCoV 12 μg: Aged >60 Years - Day 57 BoosterCVnCoV 12 μg: Aged 18-60 Years - Day 180 BoosterCVnCoV 12 μg: Aged >60 Years - Day 180 Booster
Day 5725.937 ± 4.4384——
Day 8574.642 ± 3.0879——
Day 18016.957 ± 3.36567.308 ± 2.53285.867 ± 1.7802
Day 208—141.724 ± 2.023254.639 ± 3.3018
Day 393—28.280 ± NA—

Adverse events

Collected over Day 1 to Day 393. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
CVnCoV 6 μg0/23 (0%)1/23 (4.3%)21/23 (91.3%)
CVnCoV 12 μg3/584 (0.5%)14/584 (2.4%)567/584 (97.1%)
Active Control1/61 (1.6%)1/61 (1.6%)59/61 (96.7%)
Most frequent serious events
Showing 10 of 14
Most frequent serious events
EventCVnCoV 6 μgCVnCoV 12 μgActive Control
COVID-19Infections and infestations1/231/5840/61
Retinal vein occlusionEye disorders0/230/5841/61
AppendicitisInfections and infestations0/232/5840/61
Cholecystitis acuteHepatobiliary disorders0/232/5840/61
COVID-19 pneumoniaInfections and infestations0/231/5840/61
Extraocular muscle paresisEye disorders0/231/5840/61
Clavicle fractureInjury, poisoning and procedural complications0/231/5840/61
Multiple injuriesInjury, poisoning and procedural complications0/231/5840/61
Wrist fractureInjury, poisoning and procedural complications0/231/5840/61
Ovarian cancerNeoplasms benign, malignant and unspecified (incl cysts and polyps)0/231/5840/61
Most frequent other events
Showing 10 of 26
Most frequent other events
EventCVnCoV 6 μgCVnCoV 12 μgActive Control
Injection site painGeneral disorders17/23526/58447/61
HeadacheNervous system disorders13/23390/58433/61
FatigueGeneral disorders7/23315/58422/61
MyalgiaMusculoskeletal and connective tissue disorders9/23315/58413/61
ChillsGeneral disorders8/23254/58410/61
ArthralgiaMusculoskeletal and connective tissue disorders8/23237/58412/61
PyrexiaGeneral disorders4/23182/5844/61
NasopharyngitisInfections and infestations4/23155/58412/61
DiarrhoeaGastrointestinal disorders5/23107/5846/61
COVID-19Infections and infestations3/23108/58412/61

Baseline characteristics

Safety Analysis Set: All participants who received at least 1 dose of trial vaccine and for whom any post-vaccination safety data are available.

Age, Continuous
Age, Continuous(years)CVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 YearsTotal
Mean50.2 ± 8.4465.6 ± 4.0838.1 ± 12.0869.0 ± 6.0631.6 ± 12.3166.7 ± 5.0753.4 ± 18.16
Sex: Female, Male
Sex: Female, Male(Participants)CVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 YearsTotal
Female741181391216296
Male571711561914372
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)CVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 YearsTotal
Hispanic or Latino12112832873130654
Not Hispanic or Latino00680014
Unknown or Not Reported0000000
Race/Ethnicity, Customized
Race/Ethnicity, Customized(Participants)CVnCoV 6 μg: Aged 18-60 YearsCVnCoV 6 μg: Aged >60 YearsCVnCoV 12 μg: Aged 18-60 YearsCVnCoV 12 μg: Aged >60 YearsActive Control - Hepatitis A Vaccine: Aged 18-60 YearsActive Control - Pneumococcal Vaccine: Aged >60 YearsTotal
White003100114
Black or African American0021104
Asian0010001
Other12112832843029649
08

Study locations

2 sites
  • Centro de vacunación internacional - CEVAXIN Panama Clinic
    Panama city, 0831, Panama
  • Instituto de Investigación Nutricional
    Lima, Lima - 12, Peru
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 28, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04515147
Lead sponsor
CureVac
Collaborators
German Federal Ministry of Education and Research
Responsible party
Sponsor
First posted
Aug 17, 2020
Start date
Sep 21, 2020
Primary completion
Feb 21, 2022
Completion
Feb 21, 2022
Results posted
Sep 28, 2023
Last update
Sep 28, 2023

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Sep 2023. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Studies of the drug tested here: CVnCoV COVID-19 vaccine

Start the discussion