With the development of medical technology and immunology, vaccines have become one of the effective methods to prevent various diseases. Common vaccines include hepatitis B vaccine, rabies vaccine, HPV vaccine, and now the country calls for inactivated New Crown vaccine which is used to prevent New Crown virus. Usually, there are no hard and fast rules on diet after vaccination, but it is recommended that vaccinated people should consume the following foods as little as possible: 1. spicy foods: common such as hot pot, spicy hotpot, spicy fried vegetables, etc. These foods contain more chili, onion, ginger, garlic, etc., which are too spicy and greasy and may lead to discomfort in the gastrointestinal tract and easily interfere with the observation of adverse reactions after vaccination; 2. allergy-prone foods: such as Allergy-prone patients are prone to allergic reactions if they eat such foods after vaccination, and they are easily confused with adverse reactions after vaccination; 3. drinks: such as strong tea, coffee, wine, etc., especially excessive drinking can damage the immune function of the body, which may stimulate the body to have uncomfortable symptoms. After the vaccination, patients can eat foods rich in protein, carbohydrates, vitamins and trace elements, such as carrots, lean meat, apples, etc. Also, pay attention to rest and avoid strenuous exercise and heavy physical exercise to prevent discomfort at the vaccination site.