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,在英國,具有新型冠狀病毒肺炎(COVID-19,即2019冠狀病毒病)抗體的人羣比例在夏季期間有所下降。這一發現增加了有關自然免疫力可能在幾個月內消退的證據。
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