Most people bitten by a West Nile virus mosquito won't get sick, but in a small percentage of people, the virus invades the brain and spinal cord, which results in serious illness.
The Eastern equine encephalitis virus is spread by mosquitoes and, in rare cases, can lead to a life-threatening brain infection.
People with cystic fibrosis produce a thick, sticky mucus that causes wide-ranging problems in the lungs, pancreas and digestive system.
Psoriasis causes new skin cells to grow in days rather than weeks. New skin builds up rapidly, forming thick patches and scales on the surface.
People may be picking up rat lungworm disease by eating a fast-climbing creature that's part slug, part snail.
A rare psychological occurrence, Stockholm syndrome is when hostages develop positive feelings toward their captors during an abduction incident.
Alzheimer's disease, the most common form of dementia, causes memory and thinking problems, as well as behavioral changes in older adults.
The measles can be dangerous for people of all ages, but the highly contagious virus poses a particular threat to pregnant women.
A man in England has sworn off cleaning his ears with a cotton swab after developing a potentially life-threatening infection.
An at-home screening test for colorectal cancer may be as good an option as a colonoscopy, a new review study finds.
When a British woman returned from a visit to Uganda, she didn't realize that a live baby fly had hitched a ride home with her.
There's nothing strange about breaking out into a heavy sweat on a sweltering day, or, after some serious physical activity.
Sometimes, you just really want a peanut butter and jelly sandwich. And, as long as you're not allergic to the ingredients, that's totally fine. At least, that's what one woman thought.
There's a whole range of reasons you don't want to be bitten by a black widow spider, but you probably wouldn't think that losing the ability to pee is one of them.
When a man in India took a fist to the left side of his face during a fight, he may have temporarily seen stars.
Hand, foot and mouth disease can spread quickly across child care centers and elementary schools. Here's what to look for and how to manage the disease.
A woman's body goes through a number of changes in the earliest stages of pregnancy. Here are 10 clues to help a woman figure out whether she's pregnant.
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