What Is Coronavirus Disease 2019 (COVID-19)?

A coronavirus is a kind of common virus that causes an infection in your nose, sinuses, or upper throat.They’re called coronaviruses because under a microscope, they look like a crown. Most coronaviruses aren’t dangerous. But in early 2020, after a December 2019 outbreak in China, the World Health Organization identified a new type of coronavirus. Officials named this new virus severe …