HI, I have two boys, aged 6 and 2 and both of them continue to have chest infections, cough, cold and fever almost every 3 months. Their Docs say that it is because of lack of nutrients in diet or maybe because of atmosphere pollution since we stay at a place which is near to industrial hub. The Docs have prescribed an Iron syrup and a multivitamin syrup. What need to be done to build their immunity. The kids are predominantly on a veg diet. Thanks, Krish