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The World Health Organization deemed it a variant of concern, and the U.S. is banning travel from parts of Africa where it's spreading. Here's what scientists know and what they're trying to learn.

The World Health Organization deemed it a variant of concern, and the U.S. is banning travel from parts of Africa where it's spreading. Here's what scientists know and what they're trying to learn.

The World Health Organization deemed it a variant of concern, and the U.S. is banning travel from parts of Africa where it's spreading. Here's what scientists know and what they're trying to learn.

The World Health Organization deemed it a variant of concern, and the U.S. is banning travel from parts of Africa where it's spreading. Here's what scientists know and what they're trying to learn.

The World Health Organization deemed it a variant of concern, and the U.S. is banning travel from parts of Africa where it's spreading. Here's what scientists know and what they're trying to learn.

The World Health Organization deemed it a variant of concern, and the U.S. is banning travel from parts of Africa where it's spreading. Here's what scientists know and what they're trying to learn.

Updated November 26, 2021 at 6:22 PM ET Updated 7:30 p.m. ET The U.S. is putting travel restrictions in place in response to a new variant of the

The World Health Organization deemed it a variant of concern, and the U.S. is banning travel from parts of Africa where it's spreading. Here's what scientists know and what they're trying to learn.

The World Health Organization deemed it a variant of concern, and the U.S. is banning travel from parts of Africa where it's spreading. Here's what scientists know and what they're trying to learn.

Updated November 26, 2021 at 6:22 PM ET Updated 7:30 p.m. ET The U.S. is putting travel restrictions in place in response to a new variant of the