Medicine and Health

Andrew Witty, UnitedHealth Group C.E.O., Steps Down

The company said that Mr. Witty had left the job for personal reasons. Stephen Hemsley, the company’s executive chairman, will replace him.

By Claire Moses

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A.I. Was Coming for Radiologists’ Jobs. So Far, They’re Just More Efficient.

Experts predicted that artificial intelligence would steal radiology jobs. But at the Mayo Clinic, the technology has been more friend than foe.

By Steve Lohr

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What It Means to Be a ‘Well Woman,’ According to Amy Larocca, Author of ‘How to Be Well’

In her new book, “How to Be Well,” the writer Amy Larocca draws readers down a rabbit hole of serums, supplements and colonics. We know a lot of it doesn’t work. Why do we want it anyway?

By Marie Solis

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Bill Gates Explains His Plans to Close the Gates Foundation in 2045

In a wide-ranging interview, he explains his decision — amid the Trump administration’s assault on foreign aid — to accelerate the end of his giving.

By David Wallace-Wells