Rob Stein

On the third floor of a big Soviet-era apartment building in Kharkiv, Ukraine, the mother of one of the world's first babies created with DNA from three different people cracks open her door.

"Hello; my name is Tamara," she whispers, to avoid waking her son from his nap.

In a clinic on a side street in Kiev, the capital of Ukraine, doctors are doing something that, as far as is publicly known, is being done nowhere else in the world: using DNA from three different people to create babies for women who are infertile.

Doctors at the National Institutes of Health say they've apparently completely eradicated cancer from a patient who had untreatable, advanced breast cancer.

The case is raising hopes about a new way to harness the immune system to fight some of the most common cancers. The methods and the patient's experience are described Monday in a paper published in the journal Nature Medicine.

Updated at 1:54 p.m.

A prescription painkiller that has been under a cloud for more than a decade is apparently safer than previously believed, a Food and Drug Administration panel concluded Wednesday.

There's more bad news about the nation's devastating opioid epidemic.

In just one year, overdoses from opioids jumped by about 30 percent, according to a report released Tuesday by the Centers for Disease Control and Prevention.

Hopes were dashed this week that the United States was finally making progress in the fight against childhood obesity.

Contrary to previous reports, the epidemic of fat has not abated. In fact, there's been a big jump in obesity among the nation's youngest children, according to the latest analysis of federal data, published Monday in the journal Pediatrics.

Shaorong Deng is sitting up in bed at the Hangzhou Cancer Hospital waiting for his doctor. Thin and frail, the 53-year-old construction worker's coat drapes around his shoulders to protect against the chilly air.

Deng has advanced cancer of the esophagus, a common form of cancer in China. He went through radiation and chemotherapy, but the cancer kept spreading.

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.

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