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巴西专家称去年11月下水道中已存新冠病毒
“我们很确定,我们从去年11月的下水道水样中发现的就是新冠病毒。”
“这说明,很久以前人们就已携带这种病毒了。他们被感染,却没被诊断出来,因为我们当时对这种新病毒一无所知。”
巴西圣卡塔琳娜联邦大学专家组的这一发现,成为多国疫情时间点大幅提前的又一铁证。
Brazilian researchers found samples of the new coronavirus in the sewer system of the southern city of Florianopolis back in late November 2019, three months before the first COVID-19 case was officially recorded in the country on February 26. CGTN's correspondent Paulo Cabral spoke to members of the research team. |