Viruses have no metabolism of their own and must therefore infect host cells in order to replicate. Contact between the virus and the cell surface is a crucial first step, which can also prevent ...

Watch a white blood cell actively searching for bacteria or viruses under the microscope.

ST. LOUIS -- Even as scientists were confirming that the West Nile virus had reached St. Louis, researchers here already have been trying to pinpoint why the mosquito-transmitted form of encephalitis ...

We’ll understand if you’re puzzled by the eerie image below. It’s a tiny piece of the Lassa virus, which can double a person over in pain, make their head swell and, in some cases, quickly result in ...

Researchers have captured the first real-time footage of viruses on the move, right before they hijack a cell. When Courtney "CJ" Johnson pulls up footage from her Ph.D. dissertation, it's like she's ...