is affecting the efficacy of some vaccines 在南非首次发现的变异基因E484K正在影响一些疫苗的疗效， FT英语电台关注 What we know about the most troublesome Covid mutations 我们对最棘手的新冠病毒突变的了解 E484K， the genetic change in the variant first identified in South Africa， 发布于2021年2月9日 14:40 Clive Cookson and Anna Gross Initial evidence that the Oxford/AstraZeneca vaccine offered only “minimal” protection against mild to moderate cases of the Covid-19 variant first identified in South Africa has focused global attention on the threat posed by mutations. Variants have become increasingly prevalent as the Sars-Cov-2 virus has spread around the world infecting more than 100m people. Some of the mutations have made the virus more contagious and better able to escape the immune protection provided by vaccines and prior infection. ，。

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