Scott Neuman

The World Health Organization is warning that the new omicron variant of the coronavirus poses a "very high" global risk because of the possibility that it spreads more easily and might resist vaccines and immunity in people who were infected with previous strains.

The Food and Drug Administration has given its OK for fully vaccinated Americans who are age 18 and older to receive a COVID-19 booster shot.

The FDA on Friday granted emergency use authorization for a third dose of the Pfizer-BioNTech and Moderna vaccines, which had already been available to people 65 and older and to anyone 18 years and older who is at elevated risk of contracting COVID-19.

Updated November 18, 2021 at 1:27 PM ET

The head of the Women's Tennis Association is questioning the authenticity of an email he received purporting to be from Chinese star player Peng Shuai, who hasn't been heard from since she made sexual assault allegations against a top Communist Party official two weeks ago.

A standoff between migrants and Polish border guards has become the biggest challenge to the EU's borders in years. The crisis appears to be stoked by the leader of Belarus over the country's tensions with the bloc.

Poland's defense minister said on Wednesday that the crisis at the border with Belarus, where thousands of migrants are trying to cross, could take months to resolve, even as there were signs that the confrontation might be ratcheting down.

Austria has placed some 2 million unvaccinated people on partial lockdown, while neighboring Germany has reintroduced free coronavirus testing, as the two countries contend with soaring rates of COVID-19 amid a Europe-wide wave of new infections.

Unvaccinated people in Austria will only be allowed to leave their homes for work, food shopping or emergencies, according to the new mandate beginning Monday.

Police are conducting spot checks of digital vaccine certificates, though there's skepticism about how effectively the lockdown can be enforced.

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