Test positivity for common cold coronaviruses significantly declined following widespread SARS-CoV-2 infection and COVID-19 ...

A cluster of viral mutations seems to be speeding the spread of COVID-19—and scientists are racing to understand how they work.

The incubation period for the coronavirus is between 2 and 14 days. On average, COVID-19 symptoms appear around 5 days after exposure, but this can vary. Learn more.

SARS-CoV-2 articles from across Nature Portfolio 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).

Novel Coronavirus (COVID-19) : Coronavirus : The explosive rise in cases of coronavirus infection is of concern worldwide. Stay up-to-date here.