The contents of safety and health education are as follows: (1) The transmission route of infectious diseases refers to the way or way that pathogens reach another susceptible person after leaving the source of infection. The main transmission routes of respiratory diseases are contact transmission in daily life and mass transmission through air and droplets. In addition, some infectious diseases can be spread through the digestive tract through water and food. Mosquito bites, that is, insect-borne transmission, and lack of blood and body fluids are also important modes of transmission of infectious diseases.

(2) Characteristics of infectious diseases: sources of infection: mainly patients and recessive infected persons. From the end of the incubation period to 5 days after onset, the virus can be excreted from nasal mucus, saliva, sputum and other secretions, and the infection period is about 1 week, and the infection is strongest in 2 ~ 3 days after onset.

God's route of transmission: the virus is mainly transmitted through droplets produced by coughing, sneezing and talking, and may also be indirectly transmitted through tea sets, utensils and towels contaminated by the virus. The speed and breadth of transmission are related to population density. Population susceptibility: Pericarpium Citri Reticulatae population is generally susceptible. After infection, different degrees of immunity can be obtained to the same antigen type, and there is no cross-immunity between types.

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Epidemic characteristics: Sudden onset, rapid spread, high incidence and short epidemic process are the epidemic characteristics of influenza. The epidemic situation has no obvious seasonality, mostly in winter and spring. The epidemic is mainly caused by influenza A virus. When a new subtype of influenza A virus appears, people are usually susceptible to infection and an epidemic occurs.