The novel coronavirus pneumonia is an animal derived virus, the report said. The current phylogenetic analysis of genome-wide gene sequences shows that bats seem to be the host of the virus, but the intermediate host has not been identified. China has carried out work in three important areas of animal traceability of the epidemic: early investigation of cases in Wuhan in December 2019; Environmental sampling of South China seafood wholesale market and other markets; Conduct detailed investigation on the source and species of wild animals sold in South China seafood wholesale market and the whereabouts of these animals after the market is closed.
In addition, novel coronavirus pneumonia spreads through droplets and close contacts between infected and infected persons without protection. No novel coronavirus pneumonia is reported, and air pollution is not the main way of transmission according to the existing evidence. However, in medical institutions, there may be the possibility of airborne transmission due to aerosols generated by medical operations.