The onset cycle of novel coronavirus is usually 3-7 days after infection, and at the latest about 14 days. Therefore, when symptoms such as weakness, fever, dry cough and digestive discomfort occur, do not panic and do not rush to the hospital first to prevent cross-infection. You can isolate yourself at home for 14 days. If after 14 days, there is no other discomfort, you can basically be sure that you are not infected by the new coronavirus.