1. Breastfeed for as long as you canBreast milk is loaded with antibodies and studies have found that breast milk protects against everything from ear infections and allergies to diarrhea and pneumonia. You'll give your baby's immune system a good headstart through nursing -- it's one key reason why the American Academy of Pediatrics recommends exclusvie breastfeeding for at least 6 months. The colostrum (the thick, yellowish fluid you produce immediately after birth) is especially rich with proteins that fight germs, so nurse for as long as you can, even if you can only do it for two weeks.
2. Feed him with immune-boosting foodstOnce your baby starts eating solids at 4 to 6 months, you can begin introducing immune-boosting foods. Go for antioxidant- and vitamin-rich foods -- fresh fruits and vegetables such as sweet potatoes and spinach are great sources. Do go for variety: Try to include a "rainbow" of fruits and veggies to ensure a diverse amount of essential nutrients.
One caveat, however. You should avoid fresh carrots, beets, collard greens, spinach and turnips until your baby is 6 months -- these veggies contain high levels of nitrates, which can be dangerous for infants.