Based on the available epidemiological data, analysis shows that novel coronavirus infection is infectious during the incubation period. Therefore, people with a clear history of epidemiological exposure need to be closely isolated for 14 days, after which no symptoms appear before being released from isolation.2019 The incubation period of novel coronavirus infection in humans is usually around 3-7 days, with the longest being 14 days, with fever as the first symptom, and may be accompanied by malaise, dry cough, nasal congestion, sneezing, runny nose, diarrhea and other symptoms. Severe patients may also gradually develop respiratory distress. If the above-mentioned symptoms appear after a history of exposure, it is important to go to a local fever clinic for pathogenic testing in a timely manner, and once the diagnosis is confirmed, the patient should be immediately admitted to a designated hospital for isolation treatment.