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How Sunlight Weakens Your Skin

Ultraviolet light can burn your skin and raise the risk for skin cancer. New research has helped uncover how the rays can weaken skin's outer layer, compromising its ability to protect the body.

Why Experts Can Pounce On New Diseases Faster As They Emerge

Public health experts have gotten much better at detecting new diseases and figuring out their cause since the SARS outbreak nearly 10 years ago. Advances in communications and genetics mean information about new microbes is more accessible.

Medicare Dings Hospitals For Too Many Repeat Customers

The Federal government wants hospitals to take responsibility for discharged patients to make sure they are not admitted again within 30 days. Medicare will penalize hospitals with many repeat admissions, but some think putting this whole burden on hospitals is not fair.

Vitamin D No Help For Colds

Some lab studies suggested vitamin D supplements might enhance immunity. But a clinical test in New Zealand found that taking vitamin D didn't reduce the frequency or duration of colds for the people who took the supplements.