SARS-CoV-2 is a positive-sense single-stranded RNA virus. It is contagious in humans and is the cause of the coronavirus disease 2019 (COVID-19). Vaccination-induced antibody responses wane, but ...

About the Phase 3 C-BEYOND and C-FORWARD Trials in Adults with Chronic HCV ...

Only when the amount of virus is high enough will a person’s test become positive. For most omicron variants in circulation today, this is one to three days, depending on the initial amount of ...