Not the WHO's definitions

Coronavirus

The coronavirus is a newly discovered virus that causes the coronavirus disease. The disease (COVID-19)is an infectious disease caused by the virus. The disease was first identified in December 2019 in Wuhan, the capital of China's Hubei province, and has since spread globally, resulting in the ongoing 2019–20 coronavirus pandemic. Common symptoms include fever, cough, and shortness of breath. Other symptoms may include fatigue, muscle pain, diarrhea, sore throat, loss of smell, and abdominal pain. The virus is mainly spread during close contact, and by small droplets produced when people cough, sneeze, or talk.

To prevent the coronavirus from spreading, you should keep away from crowded places if you have symptoms to not infect others OR to not be infected by others if you don't have it.

by Not the WHO April 6, 2020