Is it normal for my child to have a fever after getting a vaccine?

Mild reactions to vaccines such as a low-grade fever and fussiness may occur but fortunately do not last long.

Although newborns may run a fever after receiving immunizations, check in with your pediatrician because any fever in a baby younger than 3 months should be evaluated. Some infants and toddlers will have a fever after their immunizations. Having a mild fever without any other symptoms is not dangerous. Give an appropriate dose of infant acetaminophen for a temperature above 100.4°F (38°C) or if your infant seems cranky. Your pediatrician may recommend a dose of acetaminophen just prior to the next set of vaccines or that you give acetaminophen as needed for the next 24 hours.