Researchers are homing in on how kids reap long-term health benefits from getting dirty, whether cuddling furry pets or playing with friends.

From "good dirt" to nutrition, we talked to parents and experts about the building blocks of a super-powered immune system. Every parent knows a familiar cycle: summer freedom gives way to September ...

Immune amnesia — measles’ little-known complication — can leave unvaccinated children at a higher risk for infections for years.

It's widely known that breastfeeding impacts the health of both mother and child, but the underlying biology that leads to these effects has been understudied. In a review article publishing in the ...

How does the same infection, say the flu or a cold, give some people mild symptoms and leave others suffering? Why do people develop autoimmune diseases? And will we ever be able to predict when—and ...

Your immune system may be weak if you have frequent, severe, or extended infections. Learn more signs of a weak immune system.