My 3 year old has asthma, but I'm beginning to wonder if there is more going on with his little body. He spends more of the year sick than not. As in he has bronchitis 3-6 times yearly, bronchiolitis 3-6 times yealy, various strains of flu 2-4 times yearly, unidentified viruses 2-4 times yearly, unidentified infections 2-4 times yearly, pnuemonia 0-1 time yearly, chicken pox 0-1 time yearly, stomach bugs 4-7 times yearly, allergic reactions/allergy flares too often to count, and has a cold almost all the time. None of those viruses, infections, or whatever last less than a week, most last 2-3 weeks for him. He's basically always sick. When do I worry about something being wrong with his immune system? Could he have some can of disease or disorder than impairs his immune system? Does asthma do that or could this be something more than that? How would I know? How do I boost his immune system.