Disease can arise both when immune cells are too active and when they're not active enough. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. For ...

Your immune system is like an incredibly sophisticated security team, constantly patrolling your body for threats and neutralizing them before they can cause harm. When it’s working properly, this ...

The immune system remains seriously out-of-whack—in an inflammatory state of overactivation and impaired ...

A microscopic parasite that can live for decades in the human brain infects an estimated one-third of the world's population ...

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 ...

Mary E. Brunkow, Fred Ramsdell and Dr. Shimon Sakaguchi won the Nobel Prize in medicine on Monday for their discoveries concerning peripheral immune tolerance. Brunkow, 64, is a senior program manager ...