A cold sore or fever blister is caused by the herpes simplex virus (HSV). About 50 to 80 percent of American adults carry HSV type 1 (HSV-1), which is why this virus is the most common cause of cold ...
Learn about the role of lymph nodes in your body, why they swell, the likely causes, and how it might relate to conditions ...
When we head out into the wild, even if it’s just a camping trip, we like to believe we’d know exactly what to do if things ...