That was first published March 4! on http://medrxiv.org and referred to in http://scmp.com on March 6 (https://www.scmp.com/news/china/society/article/3073850/coronavirus-no-new-infections-chinas-hubei-province-outside …) https://www.medrxiv.org/content/10.1101/2020.03.03.20028423v3 …
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