Chunxiao Li1, Yigang Tong1, Tao Jiang1, Yeqin Sun2, Tongyu Fang3. 1. The Chinese Mobile Laboratory Team in Sierra Leone, Beijing 100071, China; State Key Laboratory of Pathogen and Biosecurity. 2. The Chinese Mobile Laboratory Team in Sierra Leone, Beijing 100071, China; Bureau of Medical Administration, Health Department of General Logistics Department, Chinese People's Liberation Army; Email: yeqinsun@163.com. 3. The Chinese Mobile Laboratory Team in Sierra Leone, Beijing 100071, China; State Key Laboratory of Pathogen and Biosecurity; Email: fangty@bmi.ac.cn.