Staff members carry medical supplies to be transported to Wuhan in Nanjing, east China's Jiangsu Province, Jan. 25, 2020. The first group of 147 medical staff of Jiangsu Province left for Wuhan, the center of the novel coronavirus (2019-nCoV) outbreak, to provide medical aid. (Xinhua/Li Bo)

A relative encourages the medical staff at Nanjing South Railway Station in Nanjing, east China's Jiangsu Province, Jan. 25, 2020. The first group of 147 medical staff of Jiangsu Province left for Wuhan, the center of the novel coronavirus (2019-nCoV) outbreak, to provide medical aid. (Xinhua/Li Bo)

Medical staff prepare to board train at Nanjing South Railway Station in Nanjing, east China's Jiangsu Province, Jan. 25, 2020. The first group of 147 medical staff of Jiangsu Province left for Wuhan, the center of the novel coronavirus (2019-nCoV) outbreak, to provide medical aid. (Xinhua/Li Bo)

Crew members of a military transport aircraft pose for a group photo at Xi'an Xianyang International Airport in Xi'an, capital of northwest China's Shaanxi Province, Jan. 24, 2020. For providing medical aid, an air force unit accepted a mission to transport a team of medical staff to Wuhan, the center of the novel coronavirus (2019-nCoV) outbreak. (Photo by Li Shining)