It is relatively common for five-month-old babies to develop fever after receiving the DPT vaccine. Some children after vaccination will have some vaccine reaction, there will be a mild fever, generally more rest, drink more water, after 2-3 days of the child’s body temperature can be lowered, and the fever temperature will not be too high, generally will not exceed 38 degrees. If the child’s fever is more serious, accompanied by poor mental state, or other adverse reactions, we must take the child to the hospital for consultation. For high fever, you need to use some antipyretic drugs for treatment, you can take oral ibuprofen suspension, acetaminophen granules for fever reduction treatment. In addition, blood tests and C-reactive protein are also needed to clarify the specific type of infection. If there is a simple elevation of C-reactive protein, treatment with antiviral medications, such as ribavirin, is needed. If white blood cells are elevated, the infection is bacterial and requires antibiotics.