Many children have fever after polio vaccination, which often affects many children, but as long as the temperature is not particularly high and does not exceed 38°C for the time being, observe and feed more water. If the temperature drops to normal after 1-2 days, no special treatment is needed. However, if the temperature rises repeatedly within 1-2 days, with the highest temperature exceeding 38°C, it is recommended to go to the hospital to improve blood tests and other related tests to consider possible combined bacterial or viral infections. The vaccine itself is a toxoid, so there will be changes in body temperature, so do not be too nervous and worried.