Status and phase
Conditions
Treatments
Study type
Funder types
Identifiers
About
To monitor the effectiveness of the single-dose Ad26.COV2.S COVID-19 vaccine among health care workers (HCW) in South Africa
Full description
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:
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
Enrollment
Sex
Ages
Volunteers
Inclusion and exclusion criteria
Inclusion criteria
Inclusion criteria for the sub-cohort
Exclusion criteria
Note:
• Vaccination within 14-90 days with other COVID19 or non-specific vaccines are not exclusionary but should be discussed with study PI or designee.
Conditions of interest:
We note that international reports of VITT have not identified a risk factor, nor does there appear to be any prothrombotic state that indicates a risk factor for this immune response.
Nevertheless, the Sisonke study will enrol participants with chronic history of severe clotting disorders only after consultation and approval of the study Protocol Safety Review Team (PSRT).
We have identified certain specific conditions of special interest such as:
Primary purpose
Allocation
Interventional model
Masking
Loading...
Data sourced from clinicaltrials.gov
Clinical trials
Research sites
Resources
Legal