https://themessenger.com/news/top-china-scientist-wont-rule-out-covid-19-lab-leak-theory
the former head of China’s Centers for Disease Control said he couldn’t dismiss the possibility that the Covid-19 pandemic was caused by a laboratory leak, BBC reported Tuesday. 据英国广播公司 (BBC) 周二报道，中国疾病预防控制中心前负责人表示，他不能排除 Covid-19 大流行是由实验室泄漏引起的可能性。