标题: [其他] U.S. Covid Cases Found as Early as December 2019, Says Study [打印本页]

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作者: jobtom878    时间: 2021-2-5 08:12     标题: U.S. Covid Cases Found as Early as December 2019, Says Study

Serologic testing of U.S. blood donations to identify SARS-CoV-2-reactive antibodies: December 2019-January 2020.  https://www.bloomberg.com/news/a ... -before-china-cases

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