Asymptomatic SARS-CoV-2 infection
infection, infections
ASYMPTOMATIC SARS-COV-2 INFECTION, INFECTION, INFECTIONS
Asymptomatic SARS-CoV-2 infection was measured by RT–PCR of nasal swabs and/or serology tests obtained at post baseline study visits counted starting 14 days after the injection in participants with negative SARS-CoV-2 status prebooster. Asymptomatic SARS-CoV-2 infection was identified by the absence of symptoms and infections as detected by RT–PCR or serology tests. Specifically, the absence of COVID-19 symptoms AND at least either a positive serology test result based on bAb specific to SARS-CoV-2 nucleocapsid protein day 29 or later, when blood samples for immunogenicity are collected, or a positive RT–PCR test at scheduled or unscheduled/illness visits. The date of documented asymptomatic infection was the earlier date of positive serology test result based on bAb specific to SARS-CoV-2 nucleocapsid due to infection, or positive RT–PCR, with absence of symptoms. The time to the asymptomatic SARS-CoV-2 infection was calculated as the date of asymptomatic SARS-CoV-2 infection minus the date of injection +1.