Medical team members attend a ceremony before leaving for Hubei Province at Changshui International Airport in Kunming, capital of southwest China's Yunnan Province, Feb. 19, 2020. The 6th batch of some 150 medical staff from Yunnan Province departed Wednesday to Hubei Province to help the novel coronavirus control efforts there. (Xinhua/Jiang Wenyao)

Crew members salute to the medical staff as they board the flight to Hubei Province at Changshui International Airport in Kunming, capital of southwest China's Yunnan Province, Feb. 19, 2020. The 6th batch of some 150 medical staff from Yunnan Province departed Wednesday to Hubei Province to help the novel coronavirus control efforts there. (Xinhua/Jiang Wenyao)

Medical team members board the flight to Hubei Province at Changshui International Airport in Kunming, capital of southwest China's Yunnan Province, Feb. 19, 2020. The 6th batch of some 150 medical staff from Yunnan Province departed Wednesday to Hubei Province to help the novel coronavirus control efforts there. (Xinhua/Jiang Wenyao)

Medical team members board the flight to Hubei Province at Changshui International Airport in Kunming, capital of southwest China's Yunnan Province, Feb. 19, 2020. The 6th batch of some 150 medical staff from Yunnan Province departed Wednesday to Hubei Province to help the novel coronavirus control efforts there. (Xinhua/Jiang Wenyao)

Medical team members board the flight to Hubei Province at Changshui International Airport in Kunming, capital of southwest China's Yunnan Province, Feb. 19, 2020. The 6th batch of some 150 medical staff from Yunnan Province departed Wednesday to Hubei Province to help the novel coronavirus control efforts there. (Xinhua/Jiang Wenyao)

Medical team members attend a ceremony before leaving for Hubei Province at Changshui International Airport in Kunming, capital of southwest China's Yunnan Province, Feb. 19, 2020. The 6th batch of some 150 medical staff from Yunnan Province departed Wednesday to Hubei Province to help the novel coronavirus control efforts there. (Xinhua/Jiang Wenyao)

Medical team members attend a ceremony before leaving for Hubei Province at Changshui International Airport in Kunming, capital of southwest China's Yunnan Province, Feb. 19, 2020. The 6th batch of some 150 medical staff from Yunnan Province departed Wednesday to Hubei Province to help the novel coronavirus control efforts there. (Xinhua/Jiang Wenyao)