Influenza A requires at least 1~2 weeks of isolation, and if necessary, isolation in accordance with medical advice to reduce the risk of cross-infection. Influenza A, known as influenza A, is an acute respiratory infectious disease caused by influenza A viruses mainly transmitted by droplet transmission. Because influenza A viruses are most prone to mutation, poor vaccine protection, and general susceptibility of the population, large-scale infections are most likely to occur, and the symptoms are mainly high fever, upper respiratory symptoms, diarrhea, abdominal pain, and other digestive symptoms, as well as generalized weakness, myalgia, and so on. Patients with influenza A can excrete the virus from oral and nasal secretions within 5 days after the onset of the disease, and the infectious period is about 1 week. Different groups of people infected with influenza A have different degrees of severity, young adults with mild symptoms, 7 to 10 days can be self-cured, the elderly, children, pregnant women and people with low resistance may appear high fever, respiratory difficulties, convulsions and other severe influenza symptoms, and even lead to death. Therefore, once diagnosed with influenza A, it is recommended that patients be strictly isolated for at least 1~2 weeks to reduce the risk of transmission.