The more infectious B.1.1.7 variant that has come to dominate coronavirus infection in the UK is evolving further mutations, which scientists say will make existing vaccines less effective at preventing infection.
已在英国成为新冠病毒感染主导毒株的更具传染性的B.1.1.7变种,正进化出更多的突变。科学家表示,这将降低现有疫苗预防感染的效力。
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