Recurrent fever. Cancer please advis?

Sorry sir I had asked this question yesterday Sir my child age is 5 years my concern is  last 2 months my child experience fever 3-4 times firstly in march first week completely down after antibiotic and paracetamol then again in 2 April again completely subside in 3-4 days and yesterday also he is having fever but fully controlled by paracetamol today he is not having any fever in morning 10 am I had given paracetamol child is completely active playing watching TV and all in between the fever days as well as in fever days child is completely active only fever is complaint I am telling it is fever because child body is hot but when given paracetamol the body returns normal child is completely active besides fever everything is fine but why he gets fever 3-4 times in last 2 years one sister come in our home she is having cold from last 3-4 days  for history I have written about that sister actually sir I have looked in Google that recurrent fever is symptoms of blood cancer please advis