Coronavirus appeared in Italy earlier than people thought. A study conducted by the National Cancer Institute (INT) in Milan, Italy showed that the new coronavirus has spread in Italy since September 2019, which indicates that Covid-19 may be Spread out of China earlier than previously thought. However, the findings of Italian researchers published by INT’s scientific journal "Tumori Journal" showed that among the 959 healthy volunteers who participated in the lung cancer screening test between September 2019 and March 2020, 11.6% of the coronaviruses The antibody was earlier than 2 months ago.
https://www.cnbc.com/2020/11/15/coronavirus-emerged-in-italy-earlier-than-thought-study-shows.html
CDC科學家報告稱Covid-19可能於2019年12月中旬在美國出現
根據周一發布的一項政府研究,2019年12月中旬,新的冠狀病毒感染了美國人,這是在中國正式發現冠狀病毒之前的幾週,比公共衛生部門發現第一例美國病例早一個月。
這些發現大大增強了證據,表明該病毒早在公共衛生當局和研究人員意識到之前就已經在世界範圍內傳播,顛覆了人們對這種病毒出現的時間和速度的最初思考。