The high incidence of influenza is in winter and spring, around November and December and February and March, and in the southern region, influenza can be prevalent throughout the year. Influenza, or influenza, is an acute respiratory infection caused by the influenza virus. It spreads mainly through contact and air droplets. The dry air in winter and spring makes influenza characterized by seasonal onset, and it is often prevalent in November, December and February/March, i.e. the winter and spring seasons. In the warmer south, influenza can be prevalent throughout the year. Influenza viruses can mutate through antigenic drift and antigenic shift, causing the human body to lose partial or total immunity to the mutated virus, thus causing influenza epidemics. In daily life, attention should be paid to personal hygiene, timely injection of influenza vaccine before the onset of the influenza season, attention to self-protection during the influenza season, and minimize the need to go to crowded public places, etc. If you feel unwell, it is recommended that you consult a doctor promptly. If you feel unwell, it is recommended that you seek medical attention in a timely manner for diagnosis and treatment.