London — Prime Minister Boris Johnson says Britain is in “a race against time” to roll out Covid-19 vaccines as deaths hit record highs and hospitals run out of oxygen, with his top medical adviser saying the pandemic’s worst weeks were imminent.
A new, more transmissible variant of the disease is surging through the population, with one in 20 people in parts of London infected, threatening to overwhelm the health service with hospitals overloaded with patients...
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