Ewen Callaway

Analysis reveals the signature of the antiviral drug molnupiravir in SARS-CoV-2 sequences riddled with mutations. By Ewen Callaway A drug widely used to treat COVID-19 might be spurring the evolution of new SARS-CoV-2 variants. The drug, molnupiravir, works by...

Only half of participants who were exposed to the coronavirus developed infections, most with mild symptoms. By Ewen Callaway Healthy, young people who were intentionally exposed to the coronavirus SARS-CoV-2 developed mild symptoms — if any — in a first-of-its-kind...