Hello my son gets cold n cough every now n then last year in december he got high fever with cold n got admitted dr said he has mild pneumonia n gave antibiotics via iv after discharge he was given levolin n budecart which i stopped after 2 months full year he was at home no outside contact so he dint get cold now again he got cold from my husband n again too much cough n chest congestion dr gave antibiotic levolin syrup nebulisation n lastly 3 days levolin inhaler he is better now but still has cough. I am not understanding why he catches so severe chest cold & why inhalers are given i want to find n keep him healthy n away from falling so sick with cold pls guide what should i do.