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Public health experts warn that the rush to impose travel bans on southern African countries after the omicron variant was identified can work against scientific transparency.

President Biden received a briefing from his medical task force, including Dr. Anthony Fauci, who said that "inevitably" the omicron variant will turn up in the U.S.

The omicron variant has not been detected in the U.S., but Dr. Anthony Fauci says it is certain to be at some point. Fauci and Dr. Francis Collins appealed for people to get vaccinated as a defense.

A raft of travel restrictions are being imposed by nations around the world as they scramble to slow the variant's spread.

A new coronavirus variant, first discovered in South Africa, has begun to spread around the globe. Vaccine producers say they're working to get ahead of the new strain.

Cases of the latest COVID variant of concern — first identified in South Africa — have been reported in the U.K., Germany, Italy and elsewhere. Travel from southern Africa is now restricted.

The World Health Organization has designated a new coronavirus variant a "variant of concern" due to its large number of mutations. The strain has been named Omicron.

NPR's Audie Cornish speaks with National Institutes of Health director Dr. Francis Collins about how the new COVID-19 variant might affect U.S. response and where the national strategy goes from here.

A variant now named omicron, first detected in South Africa, prompted new overseas travel restrictions in Europe and a special World Health Organization meeting on Friday.

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.