Pathogen in COVID-19: novel coronavirus (20 19-nCoV) incubation period: 14 days Estimated outbreak time: 2019 65438+early February Discovery location: Wuhan, Hubei, China Notification time: 65438+2020 10 animal host:. It may be close droplet infection, contact infection (direct or indirect) and animal contact infection (to be clarified). Pathogen of SARS: The incubation period of SARS coronavirus (SARSCoV) ranges from 2 days to 7 days (up to 10 day). Outbreak time: 165438+2002 10 month. Location: Shunde District, Guangdong Province, China. Notification time: February 2003. Animal host: bat, civet, etc. Infectious period: within 10 days after onset (no infectivity before onset). Infection mode: close droplet infection, contact infection (direct or indirect).