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Pharmacist Sima Manifar prepares a childrens dose of the Pfizer COVID-19 vaccine during a vaccination clinic at City of Lawrences The Center, which serves seniors, families and the community, in Massachusetts. (AP/Charles Krupa)

Pfizer begins testing omicron-matched COVID shots in adults

COVID-19 vaccine-makers have been updating their shots to better match omicron in case global health authorities decide...

26 Jan 2022 11:18 AM IST