Vaccination is the most effective, economical and convenient means of preventing and controlling infectious diseases, and the neo-crown vaccine is no exception. The vaccination of New Coronavirus can effectively reduce the transmission of New Coronavirus, and at the same time reduce the transfer rate of patients with New Coronavirus pneumonia, making the virus infection rate significantly lower and the cure rate of patients significantly higher. In order to achieve better preventive effect, there are still some precautions to be understood after New Coronavirus vaccination: 1. Stay for 30 minutes after New Coronavirus vaccination and leave only if there is no discomfort; 2. Keep the injection site dry and pay attention to personal hygiene on the day of vaccination and arrange rest appropriately. Avoid contact with known allergens and common allergens within 1 week after vaccination, try not to drink alcohol, eat spicy and stimulating food or seafood, and recommend a light diet and drink more water; 3. After vaccination, if high fever or local reactions occur, such as high fever exceeding 38.5°C and redness exceeding 2.5 cm in size, report to the vaccinator as soon as possible in addition to symptomatic treatment. Very few people may have high fever, persistent fever for several days or other more serious conditions, and they should go to the hospital in time to prevent delays. 4. 3 types of vaccines (inactivated vaccine, adenovirus vector vaccine and recombinant protein subunit vaccine) have been approved for marketing or emergency use in China, of which 2 doses of inactivated vaccine and 3 doses of recombinant protein subunit vaccine are required. Therefore, after receiving the new crown vaccine, keep the vaccination voucher so that you can check the relevant information at the next vaccination. 5. If two or three doses of vaccine are required and the immunization program is not completed according to the vaccination program, it is recommended to complete the vaccination program as soon as possible. In case of special circumstances such as local vaccine cannot continue to be supplied or off-site vaccination, if vaccination cannot be completed with the same vaccine product, vaccination can be completed with other vaccine products of the same type of manufacturer; 6. However, if rabies vaccine, tetanus vaccine or immunoglobulin is required, the interval between vaccination and neo-coronavirus vaccine can be disregarded; 7. So far, the protection effect of any vaccine cannot reach 100%, and it is very important to continue to take other preventive and control measures until the population immune barrier is established, and there will be a smaller number of vaccinated people who may develop the disease during the epidemic. Therefore, personal protective measures such as wearing a good mask, washing hands regularly, opening windows, and maintaining social distance are still needed after vaccination.