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多国最早感染时间提前 但这件事全球专家都觉得不可思议 - IT 与健康 - cnBeta.COM
source link: https://www.cnbeta.com/articles/tech/975273.htm
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新冠疫情全球大暴发，最早感染病例出现在哪里?这是各国一直在探寻的问题。日前，美国、法国、意大利等国均有专家指出，新冠病毒感染病例发现时间又有提前。首发病例是指在一起暴发疫情中符合病例定义，最早发病的病例，它是整个疫情能追踪到的起点，但不一定就是此前疫情的最早的传染源。
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