The Perfect Enemy | Category: News | Page 1099
July 14, 2025

News

Seroprevalence of Infection-Induced SARS-CoV-2 Antibodies — United States, September 2021–February 2022 | MMWR – Centers for Disease Control and Prevention (.gov)

In December 2021, the B.1.1.529 (Omicron) variant of SARS-CoV-2, the virus that causes COVID-19, became predominant in the United States....