Hello, Thank you for asking at HCM. I went through your history and would like to make suggestions for your son as follows: 1. First of all, I would like to know more about him like - a. What was the age when he had first episode of pneumonia? b. Did he have pneumonia more than once? c. Was the right middle lobe involved more than once? c. Does he have fever every time when he has respiratory symptoms? or respiratory symptoms may present without fever also? d. Did he ever require nebulization? if yes, how many times? e. Has he ever had atopic dermatitis or urticaria? f. Does he have repeated stomach/stool problems (diarrhea/constipation/pain)? g. Does he have anyone in family with allergies? h. Is he routinely exposed to smoke/air pollution/dusts? i. Does he have repeated regurgitation/nausea/vomiting after taking hot/spicy foods/heavy meals? Above information would help me to know about your child better and therefore to suggest further investigations. 2. At present, I am thinking of two possibilities: a. allergic respiratory disorder b. repeated infections As his weight is 16 kg (appropriate for age, except if he has significant weight loss recently), I am not thinking of any serious disorder at present. But of course, diagnosing the cause of repeated respiratory symptoms is important. 3. Were I treating him, after detailed history taking, I would suggest him allergy testing and some tests for immune system (if history suggests possibility of repeated pneumonia/infections). Allergy testing will help you identify the substances causing him allergies and also to know the measures to avoid them. 4. In general, I would suggest you to avoid exposure to dusts, smokes and air pollution as much as possible for him. Hope above suggestions will be helpful to him. Should you have any further query, please feel free to ask at HCM. Thank you & Regards.