India, Aug. 20 -- Are you worried your child is always coming down with something and frequently find yourself asking the pediatrician why they keep bringing illnesses from school or daycare? It is normal for children under 7 to fall sick frequently as their immune system is not fully developed yet, and still learning to fight off common infections. As children start attending preschool or other outdoor environments more often, they are exposed to different pathogens, and the most common illnesses include common cold, flu and stomach bugs. Good news is, frequent illnesses are indicative of a developing immune system that is getting exposed to new microbes and building defenses against viruses and bacteria it encounters.

Building a robust...