The avian flu virus isolated from a hospitalized teenager in Vancouver has mutations in key areas that could help the virus spread more easily in humans, scientists say. There is no indication that ...

Ten months on from the shocking discovery that a virus usually carried by wild birds can readily infect cows, at least 68 people in North America have become ill from the pathogen and one person has ...

Bird flu has been rampaging through wildlife and farm animals worldwide. Will it make the long-feared jump to humans?

For centuries, the nature of a fever — and whether it's good or bad — has been hotly contested. In ancient Greece, the physician Hippocrates thought that fever had useful qualities, and could cook an ...

Humans have been getting infected by ancient bacteria and viruses for at least 37,000 years. Now, for the first time, pathogen DNA has uncovered a pivotal disease "turning point" that happened 6,500 ...

A brand new virus, which may be able to jump to humans, has been detected in a mouse in Florida. The virus is a type of jeilongvirus, which have previously only been found in Africa, Asia, Europe, and ...