Mild fever can occur after an influenza (flu) vaccine, usually starting within 1–2 days and resolving within 1–3 days. However, fever persisting for 3 days, especially in a young child or infant, deserves clinical assessment because an intercurrent infection may coincide with vaccination. What to do * Continue fluids frequently. * Keep clothing light and avoid over-wrapping. * If uncomfortable or fever is significant, paracetamol can be used according to the child’s weight. Routine antipyretic use solely to prevent vaccine reactions isn’t generally necessary.

I need to ask few more questions before answering your query. Early consultations can prevent complications. Kindly contact me on whatsapp chat  (84960595 six five) Dr Faisal Zoheb MBBS , MD PAEDIATRICS , PGPN (BOSTON), FELLOWSHIP IN NEONATOLOGY ( Newborn and vaccination specialist )

You can give paracetamol based on the weight of child every 6 hrly if temperature is more than 100F.

Give paracetamol

Which brand ?

Greetings Looks like viral fever Kindly hydrate the child well And give paracetamol every 4-6hrly based on the weight of the child If fever not getting settled down in 2 days review with Pediatrician