نبذة مختصرة : Additional file 1. 1. Laboratory procedures. 2. Figure. Four-tiered testing strategy for the detection of SARS-CoV-2 antibodies. 3. Table. Stratified seroprevalence sensitivity analysis. 4. Table. Results of SARS-CoV-2 seropositivity compared to reported past PCR positivity in each survey sample. 5. Table. COVID-19-like symptoms, December 2020. 6. Table. SARS-CoV-2 Seroprevalence by characteristics of HCW participants in each survey sample. 7. Table. Self-reported COVID-19 exposures and infection prevention and control (IPC) measures, May 2020. 8. References.
No Comments.