|新冠病毒时间线:病毒是何时、如何传播给人类的?
随着科学家继续对世界各地的样本展开研究 , 有证据表明 , 新冠病毒早在2019年3月就已经出现 , 这远远早于同年12月在武汉发现的时间点 。 CGTN在视频中将动画与专家采访相结合 , 梳理出新冠病毒时间线 。
The current timeline for the COVID-19 pandemic begins with a cluster of viral pneumonia cases that found in Wuhan in late December 2019 , and were reported to the World Health Organization on December 31 , 2019 。However , as scientists continue to check samples going back through the year , there has been evidence to suggest the virus was moving around as early as March 2019 。 In Barcelona , wastewater samples have been tested for the SARS-CoV-2 virus. What is the origin of the virus?How and when did it spillover to humans?
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