Editor’s Note: For the latest updates on the 2020 coronavirus outbreak, see our news coverage.

A coronavirus is a kind of common virus that causes an infection in your nose, sinuses, or upper throat. Most coronaviruses aren’t dangerous.

But in early 2020, following a December 2019ย outbreakย in China, the World Health Organization identified a new type ofย coronavirus. Officials named this new virus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This is the virus that causes COVID-19.