Serologic Testing of US Blood Donations to Identify Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2)–Reactive Antibodies: December 2019–January 2020
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Serologic Testing of US Blood Donations to Identify Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2)–Reactive Antibodies: December 2019–January 2020
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2009年,美国有毒物质和疾病登记局的一份报告在地下水中发现了污染物,但他说暴露不会对健康造成影响。https://time.com/4289156/fort-detrick-lawsuit/
新冠病毒出现在美国的时间也许比1月19日要早
https://www.bloomberg.com/news/articles/2020-12-01/covid-infections-found-in-u-s-in-2019-weeks-before-china-cases
研究人员通过对美国红十字会血样追溯发现,在2019年12月13日至16日期间,美国至少西部加利福尼亚、俄勒岗和华盛顿三州的39人血液中已经出现冠状病毒抗体