Legal basis: Article 45 of People's Republic of China (PRC) Vaccine Management Law. When carrying out vaccination, medical and health personnel shall inform the recipients or their guardians of the varieties, functions, contraindications, adverse reactions, on-site observation and other precautions of the recipients, ask the health status of the recipients and whether there are contraindications for vaccination, and record the information truthfully. The recipient or his guardian shall truthfully provide the health status and vaccination contraindications of the recipient. If vaccination is prohibited, medical and health personnel shall put forward medical advice to the recipient or his guardian, and record the medical advice truthfully. Before vaccination, medical and health personnel should check the health status of the recipients, check the contraindications of vaccination, check the vaccination certificate, check the appearance, batch number and expiration date of the vaccine and syringe, check the name and age of the recipients and the name, specification, dosage, vaccination site and vaccination route of the vaccine, and ensure that the information of the recipients, vaccination certificate and vaccine is consistent before vaccination can be implemented. Medical and health personnel shall vaccinate the recipients who meet the vaccination conditions. If adverse reactions are found in the field observation, medical and health personnel shall take timely treatment and other measures in accordance with the requirements of vaccination work norms.