#asktheexperts How to increase immunity? My son is getting frequently cold & cough for every 15 days. cough is very heavy and he is unable to control so we are using nebulizer when he is getting cold & cough. is using nebulizer every time is safe or will he get any side effects if we use now & then? we are using nebulizer and medicine for 1 week for every 15 days. He got corona when he was 10 old. are there will be any side effects if he get corona?