29, China novel coronavirus pneumonia (COVID-19) joint investigation report released by WHO.
China novel coronavirus pneumonia animal novel coronavirus pneumonia is a kind of animal origin virus, and air pollution is the main way of transmission. Bat seems to be the host of the virus, but the intermediate host has not been identified. The interpersonal transmission of new crown pneumonia in China mainly occurs in the family. Whether the patients have immunity after infection needs further study; the patients have symptoms on average 5-6 days after infection, most of them can be cured by light diseases, and the high-risk groups of severe and death are over 60 years old.