An observational study in SARS-CoV 2 Infection and Covid19, sponsored by Royal College of Surgeons in Ireland - Medical University of Bahrain. Completed at 1 site in Bahrain. Open to participants aged 21 Years and older. Per ClinicalTrials.gov, last updated 2021-10-26.
Sponsored by Royal College of Surgeons in Ireland - Medical University of Bahrain · Observational
Coronavirus disease 2019 (COVID-19) is potentially a deadly disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that targets the lung mainly, resulting in respiratory tract infections in humans. It has developed into a pandemic with serious global public health problems.
Recent research has shown that the new SARS-CoV-2 variants reduces the efficacy of the vaccinations and are predominantly more transmissible or infective. A few countries namely Bahrain, United Arab Emirates, and Turkey have recently started introducing a booster dose following primary two doses of the COVID-19 immunization series.
This study aims to identify which booster dose is more effective; taking a booster dose from the same vaccine initially taken or a booster dose from a different vaccine than initially taken.
According to the World Health Organization COVID-19 Dashboard, the coronavirus disease 2019 pandemic, has caused over 181 million infections and more than 3 million deaths worldwide as of July 1, 2021. COVID-19 is potentially a deadly disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that targets the lung mainly resulting in respiratory tract infections in humans. This has become a serious concern for public health.
Among the currently approved COVID-19 vaccines in the Kingdom of Bahrain, BBIBP-CorV (inactivated virus) vaccine and BNT162b2 (mRNA vaccine) is being administered to the population.
Inactivated vaccines have been extensively studied. In a phase 1/2 trial, the BBIBP-CorV vaccine has shown to be generally safe against COVID-19 and induce antibody responses. However, WHO's Strategic Advisory Group of Experts (SAGE) experts have summarized information from clinical trials in Bahrain, United Arab Emirates, Egypt, Jordan, and China indicating that individuals with comorbidities and older adults (≥60 years) who received 2 doses of BBIBP-CorV have low confidence in the efficacy of preventing COVID-19.
Current clinical trials have played a key role in the approval of different COVID vaccines based on their efficacy data, however, there is still uncertainty regarding the duration of protection from these vaccines towards the COVID -19 virus. Recent evidence has shown that the new SARS-CoV-2 variants reduces the efficacy of the vaccinations and are predominantly more transmissible or infective.
A few countries namely Bahrain, United Arab Emirates, and Turkey have recently started introducing a booster dose following primary two doses of the COVID-19 immunization series. The enhanced humoral response has been seen in homologous vaccination. Heterologous vaccination has shown to significantly induce more immunogenicity than homologous vector boost, and higher or comparable to the homologous mRNA regimens. Strong humoral and immune response has also been induced by heterologous vector-mRNA boosting with an acceptable reactogenicity profile.
To our knowledge, there has been no research conducted to date on the reactogenic and immunogenetic response of a COVID-19 booster dose after completing the primary two doses of the COVID-19 immunization series. This study will compare the reactogenic and immunogenetic response of heterologous BNT162b2 booster dose after completing two doses of BBIBP-CorV vaccination versus homologous BBIBP-CorV booster after completing two doses of BBIBP-CorV vaccination.
7,990 studies on the registry are indexed under COVID-19; 466 are open to participants now.
This study's enrollment of 305 is above the median of 268 across 3,208 observational studies indexed under COVID-19.
Browse COVID-19 studies →Royal College of Surgeons in Ireland - Medical University of Bahrain is the lead sponsor of 11 studies on the registry; 1 is open to participants now.
Counted across the registry records on this site, refreshed daily.
Adults aged ≥21yo. Asymptomatic 24h before the administration of booster dose. Has no active or previous RT-PCR lab-confirmed COVID-19 diagnosis. Tested negative using Rapid Antigen Detection Test on the day of receiving the booster
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.
Exclusion Criteria:
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.
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.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Two doses of BBIBP-CorV, followed by BBIBP-CorV
Biological: BBIBP-CorV
Two doses of BBIBP-CorV, followed by BNT162b2
Biological: BNT162b2
Inactivated virus COVID-19 vaccine
Also known as: Sinopharm COVID-19 vaccine
mRNA-based COVID-19 vaccine
Also known as: Pfizer-BioNTech vaccine
Change from Baseline Immunogenicity at 8 weeks
Antigen-specific humoral immune response will be analyzed using one commercial immunoassay (S, N) and one pseudovirus neutralization assay (sVNT)
Time frame: before the reception of the booster dose and on the 8th week after the reception of the booster dose
Reactogenicity
The intensity of adverse events will be graded according to a 4-grade scale: Grade 1 (mild), Grade 2 (moderate), Grade 3 (severe), and Grade 4 (life-threatening). Reactogenicity symptoms can be: Local: (Hardness, Itch, Pain, Warmth, Redness, and Swelling) • Systemic: (Chills, Fatigue, Fever, Feverish, Headache, Joint pain, Malaise, Muscle ache, Nausea, Vomiting, Diarrhea)
Time frame: A follow-up call will be made to participants that received booster doses on day 1 and day 5. To review any adverse events a weekly phone call will be made for a total of 8 weeks from the date of recruitment.
Plan to share: Yes — Monitoring, audits, and Research Ethics Committee review will be permitted and provide direct access to source data and documents. The Lead PI and the researchers assigned by him will have access to the stored data/specimens. Only the Lead PI and the researchers assigned working on this study will be eligible to obtain the data/specimens from the participants during data collection.
Supporting information: Study protocol, Statistical analysis plan, Clinical study report, Analytic code
Time frame: Dr Manaf will act as the data custodian and is responsible for the storage, handling and quality of the study data. Data will be collected in the case report form to allow for cross referencing to check validity. Study documents (paper and electronic) will be retained in a secure (kept locked when not in use) location during and after the trial has finished. All essential documents including source documents will be retained for a period of 5 years after study completion (last patient, last study point). A label stating the date after which the documents can be destroyed will be placed on the inside front cover of the case notes of trial participants.
Access criteria: Study documents (paper and electronic) will be retained in a secure (kept locked when not in use) location during and after the trial has finished.
Ran from Jul 2021 to primary completion in Sep 2021, 1 month.
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This study is completed, as verified in Aug 2021. You cannot join it, but the record below documents what was studied.
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Royal College of Surgeons in Ireland - Medical University of Bahrain