COVID-19 is the disease caused by a coronavirus called SARS-CoV-2. WHO first learned of this new virus on 31 December 2019, following a report of a cluster of cases of so-called viral pneumonia in Wuhan, People’s Republic of China. The most common symptoms of COVID-19 are fever chillssore throat.Other symptoms that are less common and may affect some patients include: muscle achessevere fatigue