By DANICA KIRKA and JILL LAWLESS Associated Press LONDON (AP) — Britain's health chief said Wednesday that a new study suggesting that a single dose of the Oxford-AstraZeneca COVID-19 vaccine provides a high level of protection for 12 weeks supports the government's strategy of delaying the second shot so it can protect more people quickly with a first dose. Britain's decision has been criticized as risky by other European countries, but Health Secretary Matt Hancock said the study 'backs the strategy that we've taken and it shows the world that the Oxford vaccine works effectively.' Hancock's comments came after Oxford […]
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