Household Secondary Attack Rates of SARS-CoV-2 by Variant and Vaccination Status
Household Secondary Attack Rates of SARS-CoV-2 by Variant and Vaccination Status
<h3>Importance</h3> An overall household secondary attack rate (SAR) of 18.9% (95% CI, 16.2%-22.0%) through June 17, 2021 was previously reported for SARS-CoV-2. Emerging variants of concern and increased vaccination have affected transmission rates. <h3>Objective</h3> To evaluate how reported household SARs changed over time and whether SARs varied by viral variant …