Reinfection With Severe Acute Respiratory Syndrome Coronavirus 2 Among Previously Infected Healthcare Personnel and First Responders

Background Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus testing among first responders and healthcare personnel who participated in a May 2020–August 2020 serosurvey that assessed spike protein antibodies provided an opportunity to assess reinfection. Methods Serology survey data were merged with virus testing results from Rhode Island (1 March 2020–17 February 2021) and New York City (10 March 2020–14 December 2020)....