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effective

Pfizer says shot is 100% effective in kids 12 to 15

A nurse, Cindy Mendez, wearing a protective mask, holds a syringe containing a dose of Pfizer-BioNTech COVID-19 vaccine during the coronavirus disease (COVID-19) pandemic at NYC Health + Hospitals Harlem Hospital in the Manhattan…

79% effective in U.S. trial

A healthcare professional will prepare a dose of the Oxford / AstraZeneca Covid-19 vaccine at the vaccine center at the Brighton Center in Brighton, southern England on January 26, 2021.Ben Stensall | AFP | Getty ImagesLONDON - The…