Need help strengthening your child's developing immune system? There is strong evidence that nursing decreases the incidence and severity of ear and respiratory-tract infections, diarrhea, meningitis, and urinary-tract infections. Some studies suggest that nursing may also help lower the risk of sudden iInfant death syndrome (SIDS). Others suggest lower rates of diabetes, certain forms of cancer, obesity, high cholesterol, and asthma in older children and adults who were breast-fed as infants. Colostrum—the thin yellow "premilk" that flows from breasts during the first several days after birth—is especially rich in disease-fighting antibodies. The AAP recommends that moms exclusively breast-feed for a baby's first six months, if possible.

Read more from our Babies & Kids bloggers on "How to boost your child's immunity." And see our report on vaccines your child needs.