my son is 4 years and 2 months old, and he is getting cold, cough and fever again and again and his weight is 14.45 kgs. what should I do to make him fine

A. Ma’am you should get a blood test done which you know exactly what’s the problem sometimes it could be due to lower level of haemoglobin sometimes some infection or allergy can be detected also the child is little underweight try to include proteins in the diet