Susan E. Matthews

A boom in the mouse population in Yosemite may be the cause of the hantavirus outbreak, one expert says.

Your cellphone might make you sick, particularly if you share.

Vitamin B3 may be a possible cure for staph infections.

Kids who wouldn't eat a marshmallow at four are more likely to stay trim later in life.

U.S. swimmer Ryan Lochte has said that 70 to 75 percent of Olympians have sex during the Games. Olympic athletes are compelled to copulation by something even stronger than looks, experts say.

People with type AB blood may be at higher risk for heart disease.

Snoring causes kids to lose sleep — and act out.

U.S. kids' and adolescents' cholesterol levels are on the decline.

Some Peruvians have been found to naturally resist the rabies infection.

Almost 50 percent of people drop out of weight-loss programs.

Doctors suggest that loneliness may lead to health problems.

Mothers in poverty may experience more anxiety because their needs are not being met, rather than for mental health reasons.

Job stress tends to increase risk of a cardiovascular event.

How does a laser hurt your eye?

Having high blood pressure may actually benefit the frail elderly.

Pets help infants stay healthier.

What are the consequences of kids accidentally eating pot brownies?

Your genes may determine how much pleasure or pain you get from opiates.

What is the most bacteria-ridden item in your hotel room?