Scientists estimate that tens of trillions of viruses live inside of us, though they’ve identified just a fraction of them. A vast majority are benign, and some may even be beneficial.

As bird flu spreads, and Team Trump begins dismantling America’s public health apparatus, a former FBI scientist and ...

HIV-infected cells break down parts of the virus inside them and present these bits on their surfaces for the immune system to monitor, but these virus fragments are “either not very abundant or ...

The U.S. is dealing with a measles outbreak, including one in New Jersey and new cases in New York City. See what the measles look like here.

But other conditions, like the temperature inside your car, also play a role. If your car is parked in the sun, for instance, and its temperature goes above 72 F, the virus won't live much longer ...