To understand well on the source of COVID-19: Rhinolophus affinis-2

At the beginning of the epidemic, most of the research done in Wuhan showed that the first patients worked or visited a seafood market in Wuhan. It was thought to have originated from snakes first, and later studies showed that it has something to do with bats. As the epidemic progresses, this virus infection has been shown to be transmitted from person to person through droplets and by placing hands on the face that come into contact with contaminated floors. The virus can be found in patients' respiratory secretions 1-2 days before the onset of clinical symptoms and two weeks after disease symptoms.