Memory loss may not always be the first warning sign that dementia is brewing - changes in behaviour or personality might be an early clue. Researchers on Sunday outlined a syndrome called "mild...

A New York City woman infected her male partner with Zika virus through sex, the first time female-to-male transmission of the germ has been documented. Zika is usually spread by mosquitoes, and...

Mosquitoes have apparently begun spreading the Zika virus on the U.S. mainland for the first time, health officials said Friday, a long-feared turn in the epidemic that is sweeping Latin America and...

Roughly half a million people from around the world are expected to travel to the Olympics in Rio de Janeiro. And while Zika is in the spotlight, there are other bugs and health problems that Olympic...

Fracking may worsen asthma in children and adults who live near sites where the oil and gas drilling method is used, according to an 8-year study in Pennsylvania. The study found that asthma...

Fracking may worsen asthma in children and adults who live near sites where the oil and gas drilling method is used, according to an 8-year study in Pennsylvania. The study found that asthma...

The brain's nerve cells communicate by firing messages to each other through junctions called synapses, and problems with those connections are linked to disorders like Alzheimer's and epilepsy. Now...

Brenda Hudson recalls weeks spent in a glass-enclosed isolation room after her first kidney transplant, her family allowed to visit only when suited up against germs. That transplant lasted a...

New York City patient was infected with bacteria that had a special type of resistance to antibiotics last year, the earliest known case in the U.S. of bacteria that could lead to a superbug...

Being too heavy may cost you your life - literally. Scientists say overweight people die one year earlier than expected and that moderately obese people die up to three years prematurely. Doctors...