Vaccination fever usually resolves spontaneously in 2-3 days, but if there is a local infection, the fever may be prolonged accordingly. Vaccines are attenuated or inactivated bacteria or toxins, which generally do not have a significant effect on the human body, but are foreign substances that can cause the body to produce an immune response and then produce antibodies to prevent the corresponding disease. Commonly, it will cause fever, local redness, red rash, runny nose, dry throat, sore throat, cough, etc., which are normal phenomena and can be healed within 2-3 days without special treatment, so vaccinators do not need to worry too much. The fever caused after vaccination is mostly low fever (body temperature 37.4℃-38℃). During the fever, pay attention to rest, drink more water, keep the vaccination site clean and dry, and also use physical methods (antipyretic paste, warm water wipe, etc.) to cool down the temperature.