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.
已在英國成爲新冠病毒感染主導毒株的更具傳染性的B.1.1.7變種,正演化出更多的突變。科學家表示,這將降低現有疫苗預防感染的效力。
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