Fewer than 10 per cent of Americans have antibodies that could protect them from developing Covid-19, according to the first nationally representative survey that shows the vast majority still have not developed an immune response to the virus.
第一項具有全國代表性的調查顯示，只有不到10%的美國人具有可以保護他們不被新型冠狀病毒肺炎（COVID-19，即2019冠狀病毒病）感染的抗體，表明絕大多數人仍未對新冠病毒產生免疫反應。
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