Sisonke (Together): OPEN LABEL TRIAL COVID-19 (Sisonke)
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|ClinicalTrials.gov Identifier: NCT04838795|
Recruitment Status : Completed
First Posted : April 9, 2021
Last Update Posted : August 1, 2022
|Condition or disease||Intervention/treatment||Phase|
|SARS (Severe Acute Respiratory Syndrome)||Biological: To monitor the effectiveness of the single dose Ad26.COV2.S COVID-19 vaccine||Phase 3|
Purpose To monitor the effectiveness of the single dose Ad26.COV2.S COVID-19 vaccine among health care workers (HCW) as compared to the general unvaccinated population in South Africa
Study design Open-label, single-arm phase 3B vaccine implementation study
Rationale South Africa is severely affected by the global COVID-19 epidemic, but currently no vaccine has been rolled out. The recent promising results of the 'ENSEMBLE' trial conducted by Janssen in South Africa, and the availability of a limited amount of vaccine doses, provide the rationale for a cohort study of vaccinated HCWs to inform the larger vaccine rollout.
Study participants Health Care workers age 18 and above working in the South African public and private health care sector (N=500 000) Study sites Department of Health Vaccine administration sites across South Africa supported by the Sisonke (Together) (VAC31518COV3012) trial Research Site Investigators and Study Staff
Study duration Participants will receive a single dose of vaccine at enrolment; to monitor outcomes the DATCOV surveillance system and NICD line list will be reviewed for up to 2 years post-vaccination.
A sub-cohort (approx. 850-1000 people) consisting of special sub-populations will be followed up at approx. 1, 3, 6 weeks and 6 months post vaccination. This group will also have outcomes monitored for up to a further 18 months, bringing their total follow-up duration to 2 years post-vaccination
Study products Ad26.COV2.S by Janssen administered as a single injection
Primary objectives • To assess the effectiveness of Ad26.COV2.S vaccine on severe COVID, hospitalizations and deaths in HCWs as compared with the general unvaccinated population in South Africa.
Secondary objectives • To estimate the incidence of symptomatic SARS CoV-2 infections in HCW
- To estimate vaccine uptake among HCWs in South Africa
- To monitor the genetic diversity of breakthrough SARS CoV-2 infections To monitor immunological responses (neutralising, non-neutralising antibodies and T cell responses) in HCWs with breakthrough infections
- To measure baseline SARS CoV-2 antibody testing to evaluate pre-existing immunity in up to 100 000 HCWs.
In a subgroup of participants (approx. 850-1000 people) including representative sub-populations of interest, e.g. elderly, immune compromised:
- To compare serum neutralization and immune responses before and after vaccination at 0, 6 weeks and up to 6 months.
- To explore clotting parameters post vaccination at weeks 0, 1, 3.
- To monitor for asymptomatic infection
Exploratory objectives To set up a comprehensive safety desk and establish a link between the national pharmacovigilance system to assist with monitoring safety and any unexpected adverse effects
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||477102 participants|
|Intervention Model:||Single Group Assignment|
|Intervention Model Description:||Open-label, single-arm phase 3B vaccine implementation study|
|Masking:||None (Open Label)|
|Official Title:||Open-label, Single-arm Phase 3B Implementation Study to Monitor the Effectiveness of the Single-dose Ad26.COV2.S COVID-19 Vaccine Among Health Care Workers in South Africa (VAC31518COV3012)|
|Actual Study Start Date :||February 17, 2021|
|Actual Primary Completion Date :||March 31, 2022|
|Actual Study Completion Date :||March 31, 2022|
- Biological: To monitor the effectiveness of the single dose Ad26.COV2.S COVID-19 vaccine
To monitor the effectiveness of the single dose Ad26.COV2.S COVID-19 vaccine among health care workers (HCW) as compared to the general unvaccinated population in South Africa
- Number of severe COVID, hospitalizations and deaths in HCWs as compared with the general unvaccinated population in South Africa [ Time Frame: 24 Months ]Rates of hospitalizations and deaths among vaccinated HCWs versus general unvaccinated population
- The number of symptomatic SARSCoV-2 infections among vaccinated HCWs [ Time Frame: 24 Months ]
Incidence rate of SARS CoV-2 infection as indicated by self-report and validation in national laboratory records.
Rates of severe disease in HCW who are found to be RT-PCR positive at anytime up to 2 years post vaccination
- The measure of genetic diversity of breakthrough SARSCoV-2 infections [ Time Frame: 24 months ]Genetic diversity of breakthrough infection virus as determined by whole genome sequencing. This will be recovered from national laboratories.
- Monitoring for asymptomatic infection in a sub-set (10 000) of HCWs [ Time Frame: 24 Months ]Rates of asymptomatic infection at baseline and follow up using SARS CoV-2 virus and antibody testing.
- Monitor for safety and any unexpected adverse effects of the vaccine administration -pharmacovigilance [ Time Frame: 24 Months ]Conduct Pharmacovigilance to monitor for safety and adverse events Numbers of safety events and/or unexpected adverse effects reported to the study team Monitor pregnancies and pregnancy outcomes reported to safety desk.
- The vaccine uptake among HCWs in South Africa [ Time Frame: 12 Months ]Proportion of HCWs approached for study participation taking part in the study and receiving the vaccine
- To monitor for safety and any unexpected adverse effects of the vaccine administration [ Time Frame: 24 Months ]To conduct pharmacovigilance to monitor for safety and any unexpected adverse effects of the vaccine administration
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04838795
|Principal Investigator:||Glenda E Gray, MBChB||Non-Executive Director|