The Coalition for Epidemic Preparedness Innovations (CEPI)
Instituto Nacional de Saúde, Mozambique
University of Antananarivo
International Centre for Diarrhoeal Disease Research, Bangladesh
Harvard University
Heidelberg University
Age
18–any
Sex
ALL
Healthy volunteers
Not accepted
You may be eligible if
1. They resided in the study area at the time of mass immunization with the Sinopharm vaccine; and
2. They are at least 18 years of age during first round of mass vaccination.
3. Their onset of symptoms was \<10 days prior to testing.
4. For each selected PCR test-positive case, we will select up to 3 test-negative controls from generally eligible subjects, matched to each case by age on the date of testing, sex, and calendar date of testing + 3 days.
You may not be if
1. We will exclude subjects for selection as controls if they have had a positive test result within the following 21 days
