Four recovered coronavirus patients fill in the forms before donating plasma at the Binjiang Branch of the Blood Center of Zhejiang Province in Hangzhou, east China's Zhejiang Province, Feb. 19, 2020. A plasma donation program has been officially launched in Zhejiang Province on Wednesday. The plasma donated by recovered coronavirus patients will be applied to the medical treatment of the coronavirus patients in critical condition. (Xinhua/Han Chuanhao)
