ClinicalTrials.gg
CompletedNCT01770743Updated Mar 18, 2024Results posted

A Phase 2 Safety and Immunogenicity Study for an Anthrax Vaccine Using 3 Schedules and Two Dose Levels

A Phase 2 interventional study of AV7909 and BioThrax in Anthrax, sponsored by Emergent BioSolutions. Completed at 4 sites in United States. Open to participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-03-18.

Sponsored by Emergent BioSolutions · Phase 2, Interventional, and Prevention

Phase
Phase 2
Study type
Interventional
Enrollment
168
Allocation
Randomized
Ages
18 Years to 50 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 14 studies in Anthrax by Emergent BioSolutions — 5 open to participants now, 5 under way, none of them phase 3. Anthrax · Emergent BioSolutions.

Enrollment
4th of 10
168 · median 142
Started
2013
with 1 other
Phase 2
3 of 14
none open now
Registered
6th of 14
by date

Among the 14 studies in Anthrax by Emergent BioSolutions, this one is the 4th largest by enrollment of the 10 interventional ones, is one of 2 that started in 2013, is one of 3 in phase 2, and was the 6th registered.

By phase

14 studies; the count open now beside each. This study's row is marked.

Other kind3 · 3 open
Phase 13 · 0 open
Phase 2this study3 · 0 open
Phase 32 · 0 open
Observational1 · 1 open
Phase 1/21 · 0 open
Phase 41 · 1 open

By the year they started

First in 2009; this study’s year is marked. 2 started in 2013.

Size and results

Median enrollment 142 across the 10 interventional studies, 55 across the 4 observational. Of the 9 that completed or were terminated, 7 (78%) have results posted.

Watch this landscapeDownload CSVWith an account: a weekly mail of what changed among 14 studies in Anthrax by Emergent BioSolutions, or all of them as a file.
02

Study summary

The purpose of this study is to assess the safety and immunogenicity of an anthrax vaccine. The vaccine schedule and dose will also be assessed.

Read the detailed description

The safety and immunogenicity of AV7909 for post-exposure prophylaxis of anthrax will be evaluated using a randomized, parallel-group, active-controlled, double-blind design with three immunization schedules and two dose levels in healthy adult volunteers. Safety will be assessed by clinical laboratory tests (hematology, serum chemistry, and urinalysis), monitoring of adverse events, vital signs, and physical examinations. Reactogenicity (systemic and injection site reactions) will be assessed by the subjects using subject e-diaries for 7 days after each immunization and by the investigator at in-clinic visits 7 and 14 days after each immunization, and at other visits, if applicable. Immunogenicity will be measured as toxin neutralizing antibody (TNA) response and seroconversion rates.

03

Conditions studied

  • Anthrax

Browse trials for

Keywords

  • post-exposure prophylaxis
  • toxin neutralization assay
04

Who can participate

Ages eligible
18 Years to 50 Years
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

  • Be 18-50 years old
  • Be in good health
  • Have access to a computer and the internet so you can complete a diary
  • Agree to abstain from sex the first 84 days of the study or practice if you are a woman who is able to get pregnant
  • Have not donated blood for the previous 8 weeks

Exclusion criteria

Exclusion Criteria:

  • A known anaphylactic response, severe systemic response, or serious reaction to a prior immunization.
  • A history of latex allergy.
  • Have received a shot (vaccine), including flu shots, in the past 6 weeks or plan to get a shot for 4 weeks after the last study shot is given.
  • Have previously served in the military any time after 1990 or plan to enlist in the military from Screening through Day 84.
  • Prior immunization with anthrax vaccine, recombinant protective antigen (rPA) vaccine, or known exposure to anthrax organisms.
  • Have participated in anthrax therapeutic or vaccine studies (monoclonal anti-PA or anthrax immune globulins or anthrax vaccines).
  • Participation in any study involving use of a pharmacological intervention within 30 days before the Screening visit or planning to participate in a study requiring dosing through the 12-month safety follow-up telephone call.
  • Have a known diagnosis of any immunodeficiency disease including but not limited to: acquired immune deficiency syndrome (AIDS), common variable immunodeficiency disease, immunoglobulin A (IgA) deficiency, or hypogammaglobulinemia.
  • Past history of significant disease such as rheumatoid arthritis, lupus erythematous, psoriasis in the area of vaccinations, or requires immunotherapy, glomerulonephritis, or autoimmune thyroiditis.
  • Have received therapy with cytotoxic drugs or Rituximab within the past 2 years.
  • A history of cytotoxic chemotherapy or radiation therapy.
  • Chronic (>10 days) daily oral or parenteral therapy in the past 12 months.
  • Any lung disease, including reactive airway disease, which requires the daily use of medications.
  • A female currently breastfeeding or with a positive pregnancy test.
  • A history of drug or alcohol abuse within 12 months prior to Screening, or a positive result on a urine drug screen for cocaine, marijuana, opiates, methamphetamines, benzodiazepines, or oxycodone.
  • Any tattoo or other skin condition in the deltoid region on either arm that may obscure the assessment of the injection sites.
  • A medical condition that, in the opinion of the PI or designee, could adversely impact the subject's participation or safety or the conduct of the study.
  • Any planned elective in-patient surgery during the study period.
Terms in these criteria, in plain language(6)

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.

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.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

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.

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.

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.

05

Study design

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

Study arms

  • Experimental
    AV7909 (Day 0 and 14)

    Route of administration: Intramuscular Dose: 0.5 mL Schedule: Day 0 and Day 14

    Biological: AV7909

  • Experimental
    AV7909 (Day 0 and 28)

    Route of administration: Intramuscular Dose: 0.5 mL Schedule: Day 0 and Day 28

    Biological: AV7909

  • Experimental
    AV7909 (Day 0, 14, and 28)

    Route of administration: Intramuscular Dose: 0.5 mL Schedule: Day 0, Day 14,and Day 28

    Biological: AV7909

  • Experimental
    AV7909 Reduced Dose

    Route of administration: Intramuscular Dose: 0.25 mL Schedule: Day 0, Day 14,and Day 28

    Biological: AV7909

  • Active comparator
    BioThrax

    Route of administration: Intramuscular Dose: 0.5 mL Schedule: Day 0, Day 14,and Day 28

    Biological: BioThrax

Interventions

  • BiologicalAV7909

    Anthrax Vaccine Adsorbed plus CPG 7909 Adjuvant

    Also known as: AV7909 Anthrax Vaccine, NuThrax

  • BiologicalBioThrax

    Also known as: Anthrax Vaccine Adsorbed (AVA)

06

What researchers measure

Primary outcomes

  1. Toxin Neutralizing Antibody (TNA) Level at Day 63

    Immunogenicity measured by the lower bound (LB) of the 95% confidence intervals (CIs) for the proportion of subjects in each study arm with Day 63 TNA 50% neutralization factor (NF50) values greater than or equal to threshold

    Time frame: Day 63

  2. Incidence of Adverse Events

    Incidence of adverse events (including assessment of symptoms, physical exam findings, clinical laboratory tests, and vital signs) from the time of the first immunization on Day 0 through Day 84

    Time frame: From the time of the first immunization on Day 0 through Day 84

  3. Incidence of Serious Adverse Events

    Incidence of serious adverse events, from the time of the first immunization on Day 0 through the 12-month safety follow-up telephone call following the last scheduled vaccination

    Time frame: From the time of the first immunization on Day 0 through the 12-month safety follow-up telephone call following the last scheduled vaccination

  4. Incidence of Reactogenicity By Severity

    Incidence of solicited systemic reactions and solicited injection site reactions each day for 7 days following each vaccination using subject e-diaries by severity. Reactions were graded using the following scale (note, for redness and swelling, the diameter \[greater of two perpendicular measurements\] was assessed by the subject using an injection site measurement tool): Grade 0 (Absent): Symptom not present; Grade 1 (Mild): Symptom present but does not interfere with activities of daily living, or affected area (redness, swelling) measures \<3 cm; Grade 2 (Moderate): Symptom causes some interference with activities of daily living, or affected area (redness, swelling) measures 3 - 10 cm; Grade 3 (Severe): Symptom prevents activities of daily living or requires treatment, or affected area (redness, swelling) measures \> 10 cm. For each reaction, subjects are counted once across all vaccinations at the highest reported level of severity.

    Time frame: For 7 days following each vaccination on Days 0, 14, 28

  5. Incidence of Clinical Laborabory Abnormalities

    Incidence of clinical laboratory abnormalities throughout the study (up to Day 84). Clinical laboratory abnormalities are presented as the total of Grade 1 (mild), Grade 2 (moderate), Grade 3 (severe), and Grade 4 (potentially life-threatening) abnormalities according to criteria adapted from the U.S. Department of Health and Human Services, Food and Drug Administration, Center for Biologics Evaluation and Research: Guidance for Industry. Toxicity Grading Scale for Healthy Adult and Adolescent Volunteers Enrolled in Preventive Vaccine Clinical Trials (September 2007). Within each laboratory parameter, subjects are counted once for their most severe occurrence of clinical laboratory abnormality.

    Time frame: From the time of first immunization on Day 0 to Day 84

  6. Incidence of Immunologically Significant Adverse Events of Special Interest

    Incidence of immunologically significant adverse events of special interest as defined by the Center for Biologics Evaluation and Research from the time of the first immunization on Day 0 through the 12-month safety follow-up telephone call following the last scheduled vaccination

    Time frame: From the time of the first immunization on Day 0 through the 12-month safety follow-up telephone call following the last scheduled vaccination

Secondary outcomes

  1. TNA Level at Day 42

    Immunogenicity measured by the percentage of subjects in each study arm with Day 42 TNA NF50 values greater than or equal to threshold

    Time frame: Day 42

  2. TNA Level at Day 28

    Immunogenicity measured by the percentage of subjects with Day 28 TNA NF50 values greater than or equal to threshold

    Time frame: Day 28

  3. TNA Seroconversion Rate

    Immunogenicity measured by the percentage of subjects who have seroconverted (defined as a 4-fold increase over Day 0 in TNA NF50 value) at Days 21, 28, 35, 42, 49, 63, and 84

    Time frame: Up to Day 84

07

Results

Posted Feb 24, 2015
Limitations and caveats
A few events collected in e-diary were downgraded (severe to moderate) on verification by the PI but were unable to be corrected in subjects' e-diary data: headache \& fatigue/tenderness in 2 subjects each; muscle ache \& pain \& AML in 1 subject each.

Participant flow

Participants were enrolled from 16 January 2013 to 14 November 2013 at 4 medical centers in the United States.

Participant flow — Overall Study
MilestoneAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
Started4434234423
Treated4434234423
Completed4231224221
Not completed23122
Withdrew: Adverse event10000
Withdrew: Withdrawal by subject00111
Withdrew: Lost to follow-up02001
Withdrew: Sponsor terminated subject10010
Withdrew: Moving out of state01000

Outcome measures

PrimaryToxin Neutralizing Antibody (TNA) Level at Day 63

Immunogenicity measured by the lower bound (LB) of the 95% confidence intervals (CIs) for the proportion of subjects in each study arm with Day 63 TNA 50% neutralization factor (NF50) values greater than or equal to threshold

Time frame:
Day 63
Reported as:
Mean · percentage of participants
Toxin Neutralizing Antibody (TNA) Level at Day 63
percentage of participantsAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
Toxin Neutralizing Antibody (TNA) Level at Day 6356.8 (39.5 to 72.9)100 (87.2 to 100)100 (81.5 to 100)90.2 (76.9 to 97.3)52.4 (29.8 to 74.3)
PrimaryIncidence of Adverse Events

Incidence of adverse events (including assessment of symptoms, physical exam findings, clinical laboratory tests, and vital signs) from the time of the first immunization on Day 0 through Day 84

Time frame:
From the time of the first immunization on Day 0 through Day 84
Reported as:
Number · participants
Incidence of Adverse Events
participantsAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
Incidence of Adverse Events3626173515
SecondaryTNA Level at Day 42

Immunogenicity measured by the percentage of subjects in each study arm with Day 42 TNA NF50 values greater than or equal to threshold

Time frame:
Day 42
Reported as:
Mean · percentage of participants
TNA Level at Day 42
percentage of participantsAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
TNA Level at Day 4286.5 (71.2 to 95.5)100 (86.8 to 100)94.4 (72.7 to 99.9)97.6 (87.1 to 99.9)70.0 (45.7 to 88.1)
SecondaryTNA Level at Day 28

Immunogenicity measured by the percentage of subjects with Day 28 TNA NF50 values greater than or equal to threshold

Time frame:
Day 28
Reported as:
Mean · percentage of participants
TNA Level at Day 28
percentage of participantsAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
TNA Level at Day 2883.8 (68.0 to 93.8)11.1 (2.4 to 29.2)94.4 (72.7 to 99.9)63.4 (46.9 to 77.9)47.6 (25.7 to 70.2)
SecondaryTNA Seroconversion Rate

Immunogenicity measured by the percentage of subjects who have seroconverted (defined as a 4-fold increase over Day 0 in TNA NF50 value) at Days 21, 28, 35, 42, 49, 63, and 84

Time frame:
Up to Day 84
Reported as:
Mean · percentage of participants
TNA Seroconversion Rate
percentage of participantsAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
Day 2163.9 (46.2 to 79.2)55.6 (35.3 to 74.5)77.8 (52.4 to 93.6)22.0 (10.6 to 37.6)14.3 (3.0 to 36.3)
Day 2897.3 (85.8 to 99.9)40.7 (22.4 to 61.2)94.4 (72.7 to 99.9)92.7 (80.1 to 98.5)57.1 (34.0 to 78.2)
Day 3597.1 (85.1 to 99.9)96.3 (81.0 to 99.9)100 (81.5 to 100)95.0 (83.1 to 99.4)66.7 (41.0 to 86.7)
Day 4297.3 (85.8 to 99.9)100 (86.8 to 100)100 (81.5 to 100)100 (91.4 to 100)95.0 (75.1 to 99.9)
Day 4991.9 (78.1 to 98.3)100 (85.8 to 100)100 (81.5 to 100)97.6 (87.1 to 99.9)95.0 (75.1 to 99.9)
Day 6386.5 (71.2 to 95.5)100 (87.2 to 100)100 (81.5 to 100)97.6 (87.1 to 99.9)85.7 (63.7 to 97.0)
Day 8475.7 (58.8 to 88.2)100 (86.8 to 100)100 (81.5 to 100)97.4 (86.5 to 99.9)63.2 (38.4 to 83.7)
PrimaryIncidence of Serious Adverse Events

Incidence of serious adverse events, from the time of the first immunization on Day 0 through the 12-month safety follow-up telephone call following the last scheduled vaccination

Time frame:
From the time of the first immunization on Day 0 through the 12-month safety follow-up telephone call following the last scheduled vaccination
Reported as:
Number · participants
Incidence of Serious Adverse Events
participantsAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
Incidence of Serious Adverse Events20001
PrimaryIncidence of Reactogenicity By Severity

Incidence of solicited systemic reactions and solicited injection site reactions each day for 7 days following each vaccination using subject e-diaries by severity. Reactions were graded using the following scale (note, for redness and swelling, the diameter \[greater of two perpendicular measurements\] was assessed by the subject using an injection site measurement tool): Grade 0 (Absent): Symptom not present; Grade 1 (Mild): Symptom present but does not interfere with activities of daily living, or affected area (redness, swelling) measures \<3 cm; Grade 2 (Moderate): Symptom causes some interference with activities of daily living, or affected area (redness, swelling) measures 3 - 10 cm; Grade 3 (Severe): Symptom prevents activities of daily living or requires treatment, or affected area (redness, swelling) measures \> 10 cm. For each reaction, subjects are counted once across all vaccinations at the highest reported level of severity.

Time frame:
For 7 days following each vaccination on Days 0, 14, 28
Reported as:
Number · participants
Incidence of Reactogenicity By Severity
participantsAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
Fatigue/Tiredness Grade 1111714198
Fatigue/Tiredness Grade 265123
Fatigue/Tiredness Grade 330100
Muscle Ache Grade 12519132713
Muscle Ache Grade 266793
Muscle Ache Grade 320000
Headache Grade 110159148
Headache Grade 273671
Headache Grade 340000
Fever Grade 100000
Fever Grade 201000
Fever Grade 320000
Warmth Grade 11715111411
Warmth Grade 210220
Warmth Grade 300100
Tenderness Grade 13127172914
Tenderness Grade 2116595
Tenderness Grade 300000
Itching Grade 1533105
Itching Grade 220000
Itching Grade 300000
Pain Grade 13029152914
Pain Grade 292786
Pain Grade 310000
Arm Motion Limitation Grade 1211511178
Arm Motion Limitation Grade 21197115
Arm Motion Limitation Grade 310000
Redness Grade 1653108
Redness Grade 221110
Redness Grade 300000
Lump Grade 113691610
Lump Grade 200000
Lump Grade 300000
Swelling Grade 11277147
Swelling Grade 200201
Swelling Grade 300000
Bruise Grade 146284
Bruise Grade 200000
Bruise Grade 300000
PrimaryIncidence of Clinical Laborabory Abnormalities

Incidence of clinical laboratory abnormalities throughout the study (up to Day 84). Clinical laboratory abnormalities are presented as the total of Grade 1 (mild), Grade 2 (moderate), Grade 3 (severe), and Grade 4 (potentially life-threatening) abnormalities according to criteria adapted from the U.S. Department of Health and Human Services, Food and Drug Administration, Center for Biologics Evaluation and Research: Guidance for Industry. Toxicity Grading Scale for Healthy Adult and Adolescent Volunteers Enrolled in Preventive Vaccine Clinical Trials (September 2007). Within each laboratory parameter, subjects are counted once for their most severe occurrence of clinical laboratory abnormality.

Time frame:
From the time of first immunization on Day 0 to Day 84
Reported as:
Number · participants
Incidence of Clinical Laborabory Abnormalities
participantsAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
Hemoglobin3929204219
Leukocytes84330
Neutrophils21130
Lymphocytes01420
Aspartate Aminotransferase32341
Alanine Aminotransferase23132
Glucose978132
Glucose Fasting00100
Bilirubin12101
Blood Urea Nitrogen10110
Urine Glucose21001
Urine Protein16105136
Urine Erythrocytes115478
PrimaryIncidence of Immunologically Significant Adverse Events of Special Interest

Incidence of immunologically significant adverse events of special interest as defined by the Center for Biologics Evaluation and Research from the time of the first immunization on Day 0 through the 12-month safety follow-up telephone call following the last scheduled vaccination

Time frame:
From the time of the first immunization on Day 0 through the 12-month safety follow-up telephone call following the last scheduled vaccination
Reported as:
Number · participants
Incidence of Immunologically Significant Adverse Events of Special Interest
participantsAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
Incidence of Immunologically Significant Adverse Events of Special Interest00000

Adverse events

Collected over From signing of the ICF to the first immunization on Day 0 (AEs recorded only if resulting from a study-related procedure) then through Day 84.. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
AV7909 (Day 0 and 14)—2/44 (4.5%)32/44 (72.7%)
AV7909 (Day 0 and 28)—0/34 (0%)18/34 (52.9%)
AV7909 (Day 0, 14, and 28)—0/23 (0%)10/23 (43.5%)
AV7909 Reduced Dose—0/44 (0%)27/44 (61.4%)
BioThrax—1/23 (4.3%)9/23 (39.1%)
Most frequent serious events
Most frequent serious events
EventAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
PyelonephritisInfections and infestations0/440/340/230/441/23
CellulitisInfections and infestations1/440/340/230/440/23
Rectal neoplasmNeoplasms benign, malignant and unspecified (incl cysts and polyps)1/440/340/230/440/23
Atelectasis neonatalRespiratory, thoracic and mediastinal disorders1/440/340/230/440/23
Most frequent other events
Showing 10 of 16
Most frequent other events
EventAV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThrax
Upper respiratory tract infectionInfections and infestations10/445/342/237/442/23
Respiratory rate increasedInvestigations6/442/344/2310/442/23
Vulvovaginal mycotic infectionInfections and infestations0/220/170/110/222/11
Red blood cells urine positiveInvestigations2/440/340/230/444/23
NasopharyngitisInfections and infestations7/443/340/232/441/23
Blood pressure diastolic decreasedInvestigations5/443/342/236/440/23
Heart rate decreasedInvestigations1/444/340/231/442/23
BradycardiaCardiac disorders2/440/341/235/440/23
Urinary tract infectionInfections and infestations0/441/342/231/440/23
Protein urine presentInvestigations0/440/340/230/442/23

Baseline characteristics

Intent-to-treat Population

Age, Continuous
Age, Continuous(years)AV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThraxTotal
Mean33.4 ± 9.032.7 ± 9.729.7 ± 10.232.8 ± 9.232.5 ± 10.432.5 ± 9.5
Age, Categorical
Age, Categorical(Participants)AV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThraxTotal
<=18 years021014
Between 18 and 65 years4432224422164
>=65 years000000
Sex: Female, Male
Sex: Female, Male(Participants)AV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThraxTotal
Female221711221183
Male221712221285
Race (NIH/OMB)
Race (NIH/OMB)(Participants)AV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThraxTotal
American Indian or Alaska Native000000
Asian100001
Native Hawaiian or Other Pacific Islander000101
Black or African American3133212
White4033204021154
More than one race000000
Unknown or Not Reported000000
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)AV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThraxTotal
Hispanic or Latino9745429
Not Hispanic or Latino3527193919139
Unknown or Not Reported000000
Region of Enrollment
Region of Enrollment(participants)AV7909 (Day 0 and 14)AV7909 (Day 0 and 28)AV7909 (Day 0, 14, and 28)AV7909 Reduced DoseBioThraxTotal
United States4434234423168
08

Study locations

4 sites
  • Miami Research Associates
    Miami, Florida 33143, United States
  • Costal Carolina Research
    Mount Pleasant, South Carolina 29464, United States
  • Central Texas Allergy and Asthma
    New Braunfels, Texas 78130, United States
  • Jean Brown Research
    Salt Lake City, Utah 84124, United States
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 18, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01770743
Responsible party
Sponsor
First posted
Jan 18, 2013
Start date
Jan 2013
Primary completion
Feb 2014
Completion
Dec 2014
Results posted
Feb 24, 2015
Last update
Mar 18, 2024

Study contacts

Gurdyal Kalsi, MD, MTOPRA
principal investigator · Emergent BioSolutions

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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Studies of the drug tested here: AV7909

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