Q: My 20 months old son catches cold and coughs easily and he is prone to it even with minor changes in season. Last month he suffered from acute bronchitis. How can he develop immunity against these infections?

A:What you are describing sounds like wheezy bronchitis (often referred to as childhood asthma). You need to discuss this with your pediatrician. If your child is anaemic (if his haemoglobin is low), then an iron supplement should help. Multivitamins containing vitamins A & D may also give benefit. Long term medicines like monteleukast and salbutamol and steriod inhalers may also prevent recurrent episodes. Please discuss this with your regular pediatrician.