SARS-CoV-2 Seroprevalence Compared with Confirmed COVID-19 Cases among Children, Colorado, USA, May–July 2021 oleh Shannon C. O’Brien, Lyndsey D. Cole, Bernadette A. Albanese, Allison Mahon, Vijaya Knight, Nathan Williams, Rachel Severson, Alexis Burakoff, Nisha B. Alden, Samuel R. Dominguez