Cao Ting (L) and her colleague prepare to work in the laboratory of Xiaogan's center for disease control and prevention in central China's Hubei Province, Feb. 14, 2020. As a designated service provider of nucleic acid detection of the novel coronavirus, Xiaogan's center for disease control and prevention can detect about 220 samples every day. Cao Ting and Li Hao, a couple who both work at the center, have fought on the frontline since Jan. 25. (Xinhua/Hu Huhu)
