Bird flu has ripped through the animal kingdom for the past few years now, killing countless birds and crossing into an alarming number of mammals. Yet people remain largely untouched. Even though the ...

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

Novel research led by Brazilian scientists describes the immune system's reactions in detail in the first living patient to ...

Learn how a naturally occurring cat coronavirus is helping reveal how viral infections can linger inside the immune system.

The total human cases from bird flu is still low but if the virus mutates in certain ways, scientists fear pandemic. They're studying how immunity from seasonal flu might protect us. Bird flu has ...