During the early stages of a pandemic, viruses tend to evolve in ways that enhance their ability to reproduce and spread, ...

Experimental infections, where a pathogen is introduced into the host body to see its effects in action, are considered the ...

A virus that most physicians have never heard of can replicate inside human lungs. That is the central finding from recent ...

When a pathogen like a dangerous virus invades the human body, it usually has to enter human cells to cause an illness. Influenza has to latch onto a receptor on the surface of a human cell so it can ...

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 ...

Veterinarians and agriculture experts are warning Colorado flock owners to be cautious as high pathogen avian influenza is making a return to the region. Commercial and backyard flocks have been ...