The influenza A vaccine is necessary. The influenza A vaccine is necessary during the high flu season. The vaccination can significantly reduce the incidence of influenza, especially for some immunocompromised people, by means of vaccination can greatly reduce the risk of influenza. Vaccination must be done at regular vaccination centers, and it is important to confirm that there are no contraindications to vaccination before vaccination. During the flu season, it is important to minimize going to places where people gather, ventilate the air, wash your hands frequently, wear a mask, and develop good habits such as not overeating, not staying up late, and eating a light diet, etc., and consult a doctor in a timely manner to avoid delaying treatment.