Before vaccination, you should know the precautions and contraindications, such as not to be vaccinated at the same time with other vaccines, stay under observation for 30 minutes, and not to be vaccinated if there is an allergic reaction or if you are pregnant, etc., so as to avoid serious adverse reactions or affecting the effect of the vaccine. 1. Precautions: Before vaccination, you should provide your own health status, recent medication to the doctor, and truthfully fill out the informed consent form. You should choose the side of the vaccination site without wounds. After the vaccination, you should stay at the vaccination site for 30 minutes in order to cope with possible adverse reactions after vaccination. Except for rabies vaccine and tetanus vaccine, it is not recommended to immunize with other vaccines at the same time, and the interval between the two vaccinations should be more than 2 weeks. Hygienic habits such as wearing a mask, keeping a social distance, not gathering, and washing hands frequently should also be maintained after vaccination. 2. After vaccination, normal activities and diet will not affect the effect of the vaccine, and there is no need to change the original lifestyle. However, it is generally recommended that you do not contact foods you are easily allergic to for one week after vaccination, and it is recommended that you eat a light diet, drink plenty of water, and rest appropriately.