Trial NCT04516746
Publication Falsey A, N Engl J Med, 2021
Primary outcome on the report: The first occurrence of SARS-CoV-2 symptomatic illness, confirmed by positive results on RT-PCR testing, with onset 15 days or more after the second dose of vaccine or placebo among participants who were seronegative for Covid-19 at baseline

Note: The risk of bias by domain corresponds to the highest risk of bias among outcomes by domain.
The overall risk of bias corresponds to the overall highest risk of bias assessed among outcomes.