The new coronavirus can cause a series of symptoms when it invades the body, and the symptoms vary according to individual immunity. Some people will have a low fever and slight weakness, which can be cured by itself in about a week; some people will have pneumonia, high fever, dry cough, weakness and difficulty in breathing, which can be cured after treatment; more serious patients will soon develop acute respiratory distress syndrome, septic shock, and complications of chronic diseases, and even death.