Your immune system harbors a lifetime's worth of information about threats it's encountered - a biological Rolodex of baddies. Often the perpetrators are viruses and bacteria you've conquered; others ...

Most cells evolve slowly, accumulating incremental changes that better suit their environments. Immune cells, because they must adapt rapidly to counter new threats, evolve much more quickly. Part of ...

A new study explains how pancreatic tumors use a sugar coating to hide from the immune system and shows that a newly ...

Simply the smell of seafood can make those with an allergy to it violently ill — and therefore more likely to avoid it. The same avoidance behavior is exhibited by people who develop food poisoning ...