Do children have high fever when they get flu vaccine?

Influenza vaccine is an

injection vaccine containing inactivated virus or attenuated live virus. For children with relatively weak immune function, it may stimulate thermoregulation function and cause fever symptoms after injection, but it is usually transient and lasts for 1 to 2 days. If the immune function of children is good, it usually does not cause obvious uncomfortable symptoms after injection.

It is recommended that children during influenza vaccination should consult a professional doctor as soon as possible after uncomfortable symptoms occur.