Bacteria and viruses are the most common causes of disease, but they have some key differences. Here's what you need to know.

A computer virus is a type of malware that can replicate itself on your computer and spread to other devices.

The word 'virus' gets tossed around a lot. Here's what actually counts, what to watch for, and how to stay two clicks ahead ...

University of Toronto researchers have made the first discovery of a virus that infects Legionella pneumophila, the bacteria that causes Legionnaires' disease.