Thank you for your query.
It is difficult to guide perfectly with this limited information.I need detailed blood reports and details of the case along with a chest X ray
findings.But if your child is having persistant lymphadenopathy
with recurrent fever
your child need through investigations like blood tests,X ray chest and probably a FNAC of the lymph node for arriving at a diagnosis. Kindly consult a good pediatrician
and a hematologist
if necessary. A trial of antibiotics can be tried for 10 days before that.But i still think your child needs a consultation.Hope this helps you out.Wishing him a fast recovery.