During the epidemic, don't add chaos to society at home. Novel coronavirus (20 19, COVID- 19), abbreviated as "COVID-19", was named "20 19 coronavirus disease" by the World Health Organization, which refers to pneumonia caused by novel coronavirus infection in 20 19. Since 20 19, 12, many cases of unexplained pneumonia with a history of exposure to the seafood market in South China have been found in some hospitals in Wuhan, Hubei Province, and they have been diagnosed as acute respiratory infectious diseases caused by novel coronavirus infection on 20 19.