A community worker informs residents of a health check in Caidian District of Wuhan, central China's Hubei Province, Feb. 7, 2020. Wuhan, the epicenter of the novel coronavirus outbreak, is combing communities to ensure every confirmed or suspected patient is located and attended to. (Xinhua/Cheng Min)

Community workers visit a neighborhood for health checks in Caidian District of Wuhan, central China's Hubei Province, Feb. 7, 2020. Wuhan, the epicenter of the novel coronavirus outbreak, is combing communities to ensure every confirmed or suspected patient is located and attended to. (Xinhua/Cheng Min)

Community workers talk about work arrangement in Caidian District of Wuhan, central China's Hubei Province, Feb. 7, 2020. Wuhan, the epicenter of the novel coronavirus outbreak, is combing communities to ensure every confirmed or suspected patient is located and attended to. (Xinhua/Cheng Min)

Community workers record residents' health information in Caidian District of Wuhan, central China's Hubei Province, Feb. 7, 2020. Wuhan, the epicenter of the novel coronavirus outbreak, is combing communities to ensure every confirmed or suspected patient is located and attended to. (Xinhua/Cheng Min)

A community worker checks residents' information in Caidian District of Wuhan, central China's Hubei Province, Feb. 7, 2020. Wuhan, the epicenter of the novel coronavirus outbreak, is combing communities to ensure every confirmed or suspected patient is located and attended to. (Xinhua/Cheng Min)

Community workers learn about residents' situation in Caidian District of Wuhan, central China's Hubei Province, Feb. 7, 2020. Wuhan, the epicenter of the novel coronavirus outbreak, is combing communities to ensure every confirmed or suspected patient is located and attended to. (Xinhua/Cheng Min)