Thank you for your query.
It is not unusual for a child to have fever
after a flu
shot. Some may even vomit after that. Kindly ensure that your son has enough fluids so that he does not get dehydrated. If he is febrile then give him paracetamol/acetaminophen
syrup 5ml. three times a day. In case there is no improvement in the next couple of hours it will be advisable to consult the doctor.
I hope I have answered your query to your satisfaction.
Wishing your son an early recovery.