Staff members work in a laboratory in Wuhan, Central China's Hubei province, Feb 13, 2020. As a designated service provider of nucleic acid detection of the novel coronavirus, KingMed Diagnostics laboratory in Wuhan conducts non-stop detection service and detects over 2,000 samples from various cities in Hubei province every day. [Photo/Xinhua]

A staff member works in a laboratory in Wuhan, Central China's Hubei province, Feb 13, 2020. [Photo/Xinhua]

A staff member delivers samples of nucleic acid detection into a laboratory in Wuhan, Central China's Hubei province, Feb 13, 2020. [Photo/Xinhua]

Staff members work in a laboratory in Wuhan, Central China's Hubei province, Feb 13, 2020. [Photo/Xinhua]

A staff member carries samples of nucleic acid detection to a laboratory in Wuhan, Central China's Hubei province, Feb 13, 2020. [Photo/Xinhua]