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乔治敦大学的两位传染病专家说,疫苗在美国变得越来越容易获得,但防止COVID-19的病毒(SARS-CoV-2)的无症状和症状出现前传播(asymptomatic and pre-symptomatic spread)才是结束大流行的关键。
https://www.sciencedaily.com/releases/2021/03/210318142500.htm
Angela L. Rasmussen1, Saskia V. Popescu. SARS-CoV-2 transmission without symptoms. Science, 2021; 371 (6535): 1206-1207 DOI: 10.1126/science.abf9569
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