Is that red bump a spider bite or could it be a staph infection caused by methicillin-resistant Staphylococcal aureus (MRSA)? MRSA, a newer type of staph infection, has been present in Iowa since at ...

If you've ever had a boil, then you know just how unpleasant these pus-filled bumps can be. Once they develop, they often become larger and more painful over time and are equally unpleasant when they ...

Jack Knudson is an assistant editor for Discover Magazine who writes articles on space, ancient humans, animals, and sustainability, and manages the Planet Earth column of the print issue. View Full ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." There are plenty of infections that you get on a regular basis, such as a cold or a stomach bug, and ...