Neocoronavirus vaccination is useful to reduce the chance of contracting neocoronavirus pneumonia. The purpose of taking the new coronavirus vaccine is to prevent new coronavirus pneumonia. The vaccine can form effective protective antibodies after injection, which reduces the chance of infection, and even if infected with the new coronavirus, the chance of developing severe infection is lower than that of unvaccinated people. At present, there is a worldwide epidemic of neocoronavirus pneumonia. It is recommended to take the neocoronavirus vaccine as early as possible if your health condition permits, and to take the vaccine according to the prescribed schedule, which will reduce the chances of infection after the antibodies are formed in your body. However, there may be adverse reactions to the new coronavirus vaccine, such as redness, swelling, pain, itching, fever, diarrhea, etc. at the injection site, which can usually subside in 1~2 days. Some contraindications should be noted when injecting the new crown vaccine, if the body has acute inflammation, the new crown vaccine can not be injected. Patients with lymphoma, HIV infection, leukemia or other autoimmune diseases are not recommended to receive the vaccine. Patients with severe respiratory diseases, severe liver and kidney diseases, malignant tumors, severe cardiovascular diseases, are not recommended to receive the new crown vaccine. After the new crown vaccine should pay attention to the diet to light, do not eat spicy food, especially do not drink alcohol. [Tips] In this article, “new coronavirus pneumonia, new coronavirus pneumonia” has been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.