ImageA health worker collecting a swab sample from a woman to test for the coronavirus after cases of the Omicron variant were detected in Porto Alegre,…
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Children waiting to be vaccinated in Albuquerque in November.credit…Paul Ratje for The New York TimesThe Centers for Disease Control and Prevention released two studies Thursday emphasizing…
pictureThe Christmas market in Trafalgar Square, London, on Saturday. Britain is trying to counter the fast-spreading Omicron variant of the Corona virus.credit…Andrew Testa for The New…