It is normal for infants to have a body temperature below 37.4℃ after vaccination. There are some side effects after vaccination, such as a rise in body temperature and discomfort at the vaccination site. If the temperature rises below 38℃, there is no need to treat with medication. You can apply antipyretic paste to the forehead, neck, large vertebral points and limbs to reduce fever, or give the child more warm water, which can also play a good role in reducing fever, or wipe with warm water, avoiding the eye of the vaccination needle to avoid infection, and the temperature can also recede to normal. If the infant’s body temperature is greater than or equal to 38.5℃ after vaccination and the fever does not subside after physical cooling, it is necessary to bring the infant to the hospital under the examination of the doctor to clarify whether the fever is caused by the side effects of the vaccine or other reasons, so that further treatment can be given.