Adverse reactions after vaccination may vary slightly from vaccine to vaccine, but most of them are the same, mainly including general reactions and abnormal reactions: 1. General reactions: after vaccination, the patient’s body may produce symptoms such as general weakness, lethargy, fever, headache, dizziness, general aches and pains, and reduced appetite, and may also lead to transient symptoms such as redness, swelling, vague pain, itching, and hard nodules at the injection site, which can be be classified as general reactions after vaccination, which can usually improve within 3 days, and if necessary, contact the vaccination unit to confirm whether further treatment is needed; 2. Abnormal reactions: such as anaphylaxis, allergic urticaria, allergic purpura, laryngeal edema, etc., or when irritability, lethargy, depression, syncope, persistent hyperthermia, convulsions, vomiting, convulsions, etc., as well as systemic infection or others causing significant injury, should promptly contact the vaccination unit and medical institution for targeted treatment. If patients have adverse reactions after vaccination, they should be treated promptly. If the adverse reaction is mild, drink more water, pay attention to regular daily rest and avoid overexertion. If the adverse reaction is serious, you should cooperate with the medical institution to conduct investigation, provide past health status, family history, allergy history, etc., and choose the appropriate treatment under the guidance of the doctor to avoid adverse consequences.