The proportion of people in Britain with antibodies that protect against Covid-19 declined over the summer, according to research that adds to evidence that natural immunity can wane in a matter of months.
研究表明,在英国,具有新型冠状病毒肺炎(COVID-19,即2019冠状病毒病)抗体的人群比例在夏季期间有所下降。这一发现增加了有关自然免疫力可能在几个月内消退的证据。
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