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Study may push back date COVID hit US
大数据发现：美国新冠零号病人可能2019年4月就已出现
A study of big data and epidemic models indicates with 50 percent probability that the first COVID-19 infection in the United States may have occurred between August and October 2019, and the earliest possible case was on April 26, 2019, in Rhode Island, according to a preprint of a study published on Wednesday.
中科院预印本平台22日发布的一项基于大数据建模分析的研究结果表明，美国新冠肺炎疫情首例感染发生概率50%的日期多数位于2019年8月到10月，最早是罗德岛州的2019年4月26日。
"A series of previous studies showed that the United States, Spain, France, Italy, Brazil and other countries had been attacked by the coronavirus before its outbreak in China," the researchers wrote.
研究人员写道：“此前一系列研究显示，美国、西班牙、法国、意大利、巴西等多国早在新冠肺炎疫情在中国暴发前就已出现遭病毒侵袭的痕迹。”
After analyzing daily epidemic data published by local health authorities from 11 US states and the District of Columbia, the researchers said they are 50 percent confident that the first COVID-19 cases in the US emerged between August and October 2019, considerably earlier than the currently acknowledged date of the first confirmed US case, on Jan 20, 2020.
在分析了美国11个州和哥伦比亚特区当地卫生当局发布的每日疫情数据后，研究人员表示，他们认为美国第一例新冠肺炎病例有50%的概率出现在2019年8月至10月之间，远远早于全美首例确诊日期2020年1月20日。
