This fever is generally normal, and the temperature will not exceed 38℃, and the fever can easily go down, such as giving the child more water or dispersing heat, and will not be repeated after it goes down. In addition to the fever, the child often does not have other symptoms, such as spirit and appetite, and should not have these fever symptoms the day after the vaccination. On the contrary, if the baby has a persistent fever after the vaccination, and this temperature exceeds 38.5℃ or more, and there is a recurrence of temperature and poor spirit and appetite, we should go to the hospital for consultation in this case.