After vaccination, due to some characteristics of the vaccine itself, a few people will have elevated body temperature, which generally lasts 1-2 days and will not exceed 3 days. If the body temperature is higher than 38.5℃, you can take antipyretic drugs at your discretion and drink more water at the same time. If the fever does not subside or continues to increase, or if the site of vaccination shows serious reactions, such as local redness, swelling, pain, pus, etc., or if the fever is accompanied by obvious discomfort such as headache, dizziness, nausea, vomiting, etc., other infections or allergies should be considered during the period. Do not hesitate to consult a doctor if you have a serious reaction or if the fever does not subside.