Hey dear as I mother I understand ur suitation.. I was also facing same suitation for my son too ..its due to weak immunity.. even i have to go for nebulizer 2 times in year too .so don't take stress . Give healthy diet its helpful in improving immunity .. give green vegetables, fresh fruits, oats, ragi ,milk ,cheese ,butter ,paneer ,eggs nd give turmeric milk daily as turmeric s antibiotic too nd its improves immunity too .I also try it now he s f9 nd improves immunity too u can try it nd make sure wear clothes according to weather too take care .