Early antiviral response in the nose may determine the course of COVID-19
Cells taken from patients at the time of diagnosis who later developed severe COVID-19 show a muted antiviral response, study finds

SARS-CoV-2 on the surface of a cultured cell. (Credit: <a href="https://flic.kr/p/2m7oAmn" target="_blank">NIAID</a>)