The World Health Organization's preliminary report into the origins of the novel coronavirus will recommend more extensive contact tracing of the first known patient with Covid-19 in Wuhan, China, as well as the supply chain of nearly a dozen traders in the Huanan seafood market, which is thought to have played a role in the early spread of Covid-19 in late 2019, according to investigators familiar with the draft report.


원문출처 : https://www.cnn.com/2021/02/21/china/who-covid-19-origins-intl/index.html