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Psoriasis is an autoimmune disease--the immune system mistakenly attacks its own body, causing red, itchy, scaly patches on the skin. But there may be a hidden upside.

Treatment injects gene into cells that increases immune system defenses

Scientists are learning to engineer the immune system to attack cancer cells, breakthroughs that could lead to cancer vaccines

I've always thought that when I get a fever, it's my body trying to make things uncomfortable for the invading pathogen. And that's often true--higher temperatures can inhibit the bad guys' ability to replicate

Technique that "tricks" immune system could eliminate potentially deadly allergies to peanuts and other foods, scientists say

As any smoker can tell you, quitting is relatively easy.

By George Wigmore of Nature magazine The sequencing of the Atlantic cod (Gadus morhua) genome has revealed an immune system never seen before in jawed vertebrates. [More]

Asthma rates have been surging around the globe over the past three decades, and for a long time researchers thought they had a good idea of what might be fueling the increase: the world we live in is just a little too clean. According to this notion--known as the hygiene hypothesis--exposure in early childhood to infectious agents programs the immune system to mount differing highly effective defenses against disease-causing viruses, bacteria and parasites.