1; Jan Drobeniuc, MD, PhD2; Theresa Kittle, MPH3; John Williams, MS1; Paul Byers, MD3; Panayampalli S. Satheshkumar, PhD2; Kengo Inagaki, MD1; Meagan Stephenson, MPH2; Sara S.
Kim, MPH2; Manish M. Patel, MD2; Brendan Flannery, PhD2; CDC COVID-19 Response Team (View author affiliations)Serosurveys estimating prior SARS-CoV-2 infections in the United States have focused on adults; little is known about seroprevalence among young persons.Serologic testing of residual blood specimens collected during May–September 2020, from 1,603 persons aged <18 years suggested that approximately 113,842 (16.3%) of 698,420 young persons in Mississippi might have been infected with SARS-CoV-2 by mid-September 2020, and only 8,993 confirmed and probable.