After vaccination, generally within 3-5 days, the diet should be light and less oily, and usually need to avoid spicy and stimulating foods, cold foods, and allergy-prone foods: 1. Itching, increasing the chance of adverse reactions; 2. Cold food: such as ice cream, ice-cream, cold drinks, etc. Cold stimulation can easily lead to gastrointestinal dysfunction and symptoms of abdominal pain and diarrhea. After vaccination, some patients will have gastrointestinal symptoms, manifesting as diarrhea, and the consumption of cold food at this time will aggravate the adverse reactions after vaccination; 3. If allergy-prone foods are consumed, allergies are likely to occur, especially for people with allergies. In addition, if the vaccination is given during medication, consult the medical staff of the local vaccination center as much as possible whether taking medication affects the vaccination. Taking glucocorticoids, immunosuppressants, etc. after vaccination can affect the production of antibodies.