Viruses are tiny — and sneaky. So sneaky that some play a deadly game of hide and seek. The "seek" part is all too familiar: They're always looking for ways to infect humans. Their ability to hide is ...

Discover what happens when Nipah virus infects the body, its early symptoms, effects on lungs and brain, and the latest cases ...

Add Yahoo as a preferred source to see more of our stories on Google. HERVs, or human endogenous retroviruses, make up around 8% of the human genome, left behind as a result of infections that ...

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 ...