Symptoms

The highly contagious virus has continued to spread.

At least 24 staff members and inmates have been exposed to an unknown substance at an Ohio correctional facility.

The deadliest year for West Nile virus so far in the U.S. was 2012, with almost 300 deaths.

The red dots that blister on the skin are an easy-to-spot symptom.

More than one-third of patients consulted the internet before coming to the emergency room.

Scientists in Sarasota developed a new machine called an Ozone Treatment System that can remove toxins from water.

The measles vaccine has led to 99 percent fewer measles cases, but the majority of patients in the current outbreak were unvaccinated, according to the Centers for Disease Control and Prevention.

Kit Tarka's parents have launched a charity after their son died.

Researchers tested people with photos of genuine and fake emotions to find out if those with psychopathic traits could tell the difference.

Annually, about 200 people are killed by the condition, whose symptoms overlap with that of the flu.

The discovery could help researchers create a blood test to diagnose depression.

Treatments exist for symptoms, but scientists haven't been able to find a cure—until now.

Natalie Rawnsley fell ill after dining at a buffet in Greece with her husband and two sons.

Hand, foot and mouth disease usually affects children under the age of five.

Scientists believe a chemical used to cure meats could trigger mania.

Experts have warned parents about the risks of boron.

Alex Childress was gardening to raise for money for college when he encountered a poisonous giant hogweed.

Angela Wright's apartment was sprayed, but the brown recluse spiders remained.

Toxic shock syndrome is widely associated with young women, but anyone can develop the life-threatening condition.

"Giant hogweed makes poison ivy look like a walk in the park," officials warned.

The new technique could be an important tool for catching a cancer that can be tough to diagnose.

Dr. Erich Voigt used Facebook to track the woman down and warn her about the lump on her neck.

Millions of people have distorted vision because of damaged corneas.

Benzocaine can trigger a condition that causes the amount of oxygen carried in blood to drop.

Externally applied sunscreen lotion is the only pharmaceutical product that can protect against UV rays.

New drug offers hope for the millions of Americans who suffer from the debilitating condition.

The teenager was hooked up to a breathing machine and had her lungs drained of fluid.

PCOS is one of the most common causes of infertility.

The virus is similar to those which caused the SARS and MERS outbreaks.

If left untreated, syphilis can cause serious health conditions, including blindness and neurological disorders that can result in death.