The sudden resurgence of the virus is a rude jolt for a country that believed it had put the worst of the pandemic behind it
Listening to the lungs of a COVID patient on Jan. 16, 2021, at Homerton Hospital in London. Protection from two shots of AstraZeneca, the most widely used vaccine in Britain, drops from 88 percent after one month to 74 percent after four to five months, according to an analysis of a study by Tim Spector, a professor of genetic epidemiology at King’s College London; Image: Andrew Testa/The New York Times
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