Diseases, Conditions, Syndromes

Britain tightens COVID rules as world on alert over omicron

The U.K. tightened up rules Saturday on mask-wearing and on testing of international arrivals after finding two cases of the new potentially more contagious omicron variant of the coronavirus that was identified just a few ...

Diseases, Conditions, Syndromes

Unknown if vaccinated people can spread COVID-19: EMA

It is still not known whether people vaccinated against COVID-19 can still transmit the coronavirus, the head of the EU's medicine regulator told MEPs on Tuesday.

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