Fever in 5 year old boy. Repeating sir!

Sir my child is 5 year old sir my concern is in last 2 months since March and April my child has developed fever 4 times which is healed when given paracetamol and zifi 100 antibiotic like firstly he develop fever in first week of March then it settles down in 4-5 days then again around 25 march he develop fever which settle down in 3-4 days after paracetamol and antibiotic then again around 12 march he develop fever and today also he is having little fever which is under control by paracetamol and antibiotic but besides fever there is no other illness child is completely active in between the fever days as well in when fever is there my boy is completely active playing , watching TV fully active but why fever is repeating sir