Before vaccination, you should pay attention to whether there are any uncomfortable symptoms, etc. After vaccination, you should pay attention to whether there are any adverse reactions, and at the same time, you need to pay attention to good local care. Before vaccination: Before receiving the booster shot, it is necessary to pay attention to the presence of fever and other symptoms of discomfort, and to determine the specific type of vaccine, whether the age of the inoculated person is appropriate. After vaccination: If the vaccination only shows weakness, low fever, etc., it is considered to be a mild adverse reaction, and usually improves after 2~3 days, but if there is a serious allergic reaction, you should seek medical treatment in time. New crown vaccine booster injection needs to do a good job of local care, avoiding water within 24 hours, and at the same time need to pay attention to observe whether the injection site red, swollen, painful and infected manifestations. The new crown vaccine booster injection must do the above precautions, the emergence of adverse conditions, should promptly consult the doctor, the doctor instructed symptomatic treatment, to prevent serious consequences.