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.

At a special session this week, the World Health Organization hopes to start sketching out a new world order. "We don't have rules of the game," says WHO head Tedros Adhanom Ghebreyesus.

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

When it comes to receiving organ transplants, patients are not usually judged on prior behavior, but some doctors are questioning whether unvaccinated COVID patients should qualify for new lungs.

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.