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

As mosquito-borne illnesses including West Nile virus, dengue and EEE spread across the U.S., experts explain how to tell them apart.

Adam’s Journal Here’s a question from a reader: What’s the difference between viruses and bacteria? Dr. James Prescribes Bacteria and viruses are often lumped together as germs, and they ...