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A single genetic mutation might decide who ends up in bed with the sniffles and who heads to the hospital, because it shuts down immune system molecules called interferons.

Demand for palm oil is destroying the habitat of endangered Sumatran orangutans. One group is working to rescue, rehabilitate and reintroduce these often-orphaned primates back into the wild.

Eight San Diegans have been sickened by a hepatitis A outbreak linked to frozen organic berries sold at Costco, the county's Health and Human Services Agency announced today.

The news from the Centers for Disease Control and Prevention that at least 49 people in seven states have gotten hepatitis A from eating organic frozen berries has given our smoothie-making some pause.

A woman filed suit in San Diego today against an Oregon fruit farm, alleging that frozen berries it sold gave her hepatitis as part of an outbreak of the disease in seven U.S. states.

Six cases of hepatitis A that are believed to be linked to frozen berries sold at Costco stores have been confirmed in California, including patients in San Diego, Orange and Riverside counties, state Department of Public Health officials said today.

Zylast is a hand sanitizer that offers protection far longer than alcohol-based products or chlorine solution. That's why USAID has named it one of its "Fighting Ebola Grand Challenge" winners.

His doctor injected him with a used syringe. Each year, millions of people contract HIV, hepatitis and other diseases that way. The solution: a syringe designed to prevent re-use.

California lets kindergartners start school as long as they've had the first dose of all required vaccines. But some schools aren't tracking whether such kids end up getting all the doses they need.

The university said the plan had been in the works for a year. But the current measles outbreak makes it more "pressing."