How long it takes for a baby to develop a fever after receiving the MMR vaccine varies from person to person, with most babies developing a fever 24 hours to 48 hours later, and a few may not develop a fever.
MMR vaccine is mainly to prevent measles, rubella, mumps and other aspects of the disease, most of the babies in the vaccination may be 24 hours to 48 hours after the fever, and may last about two days, a small number of babies in the MMR vaccination, may not appear fever.
Therefore, parents should pay attention to the observation of their babies after MMR vaccination, let the babies drink more water, when fever, you can take ice packs, warm baths and other physical methods to lower the temperature, the body temperature is more than 38.5 degrees, you can take oral acetaminophen, ibuprofen and other medications to treat the fever.
All of the above medications should be used under the guidance of a doctor, avoid self-medication.