The list of viruses infecting humans through pesky mosquito bites continues to increase: Keystone virus has joined the ranks.

It has been blamed for the almost fatal poisoning of a former Russian agent.

By Dr. Petrina Craine

"Oncolytic virus therapy" uses human viruses to fight cancer.

The environment inside the cave increases their risk of this rare disease.

A new study from the Harvard School of Public Health looked at the risks.

This is surprising given that the risk decreased in men working long hours.

Blue lights on skin make it harder to see surface veins.