The precautions for vaccination include before, during and after vaccination. Before vaccination, you need to be clear about the time and place of vaccination, whether it is suitable for you, the type of vaccine, subsequent adverse reactions, and sign an informed consent form. At the time of vaccination, it is necessary to confirm the type of vaccine and cooperate with the vaccination. After the vaccination, you need to pay attention to diet and behavior: 1. Before vaccination: First, you need to confirm whether your condition is suitable for the vaccine you want to receive, and if there is fever, allergy, serious diseases, etc., it is recommended to receive the vaccination after you have recovered. After that, consult the vaccination unit or determine the time and place of vaccination and the documents you need to bring according to the reservation. Know the adverse reactions after vaccination to avoid panic in case of uncomfortable symptoms. Common adverse reactions include redness, swelling and itching at the vaccination site, and in a few cases, fever, headache, fatigue, or digestive and respiratory symptoms. If you are pregnant, preparing for pregnancy or breastfeeding, you should also ask your doctor if this vaccine is suitable for you. In addition, you can do a good job of personal hygiene before vaccination and wear loose fitting tops to facilitate vaccination; 2. When vaccinating: you need to reconfirm the agent, dosage and shelf life of the vaccination and make sure it is correct before cooperating with the doctor; 3. After vaccination: gently press the vaccination site with a cotton swab until it no longer bleeds. Usually you need to observe the vaccination site for about 30 minutes before you can leave to avoid serious allergic reactions. In addition, adverse reactions and precautions need to be confirmed again. Bathing or strenuous exercise is usually not recommended within 24 hours after vaccination to avoid infection caused by water or sweat at the vaccination site. Also, there is a dietary contraindication to avoid spicy or cold foods, as well as foods that can easily cause allergies, as this may aggravate the discomfort after vaccination. If the vaccine is not a single vaccination, ask the vaccinator when the next vaccination will be given after the vaccination is completed. In addition, if adverse symptoms occur after vaccination, there is generally no need to panic and they can be relieved on their own after 1-2 days. If the adverse symptoms are not relieved or are aggravated, it is recommended to seek medical treatment promptly.