LONDON (AP) — AstraZeneca reported Monday that its COVID-19 vaccine provided strong protection among all adults in a long-anticipated U.S. study, raising hopes that the findings could help rebuild public confidence in the beleaguered shot in other countries and moving a step closer to clearance for American use. AstraZeneca said the vaccine was 79% effective overall at preventing symptomatic cases of COVID-19 — including in older people — a...

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