Rob Stein

A tobacco product that its maker claims to be safer than cigarettes won qualified support from a Food and Drug Administration advisory panel Thursday.

The advisers voted 8-1 to support cigarette giant Philip Morris' claim that its "iQOS" system "significantly reduces your body's exposure to harmful or potentially harmful chemicals." The device heats tobacco but doesn't ignite it.

Chinese researchers have finally figured out how to clone a primate, using the same technique Scottish researchers devised to clone the first mammal, Dolly the sheep, in the mid-1990s.

The United States appears to be in the midst of an unusually severe flu season, officials at the federal Centers for Disease Control and Prevention said Friday.

The flu season started early, which is never a good sign, and the flu is already widespread throughout the country, the CDC's latest report shows. Half of states are reporting especially intense flu activity.

Life expectancy in the U.S. fell for the second year in a row in 2016, nudged down again by a surge in fatal opioid overdoses, federal officials report Thursday.

"I'm not prone to dramatic statements," says Robert Anderson, chief of the mortality statistics branch at the National Center for Health Statistics. "But I think we should be really alarmed. The drug overdose problem is a public health problem, and it needs to be addressed. We need to get a handle on it."

Editor's note, Jan. 17: Some identifying information has been removed from this report to guard the privacy of the family that is part of the probiotics test.

It's a typical hectic morning at Michele's house in Northern Virginia when she gets a knock on her front door.

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