A recovered coronavirus patient donates plasma at Changsha Blood Center in Changsha, central China's Hunan Province, Feb. 18, 2020. Cured patients who were infected with COVID-19 are called upon to donate plasma as initial results had indicated the effectiveness of convalescent plasma-derived therapeutic products in curing infected patients in severe and critical conditions. Some recovered patients regard the donation as a way to pay back to the society after they received timely and effective treatment. （Photo: China News Service/ Yang Huafeng）
A recovered coronavirus patient donates plasma at Changsha Blood Center in Changsha, central China's Hunan Province, Feb. 18, 2020. Cured patients who were infected with COVID-19 are called upon to donate plasma as initial results had indicated the effectiveness of convalescent plasma-derived therapeutic products in curing infected patients in severe and critical conditions. Some recovered patients regard the donation as a way to pay back to the society after they received timely and effective treatment. （Photo: China News Service/ Yang Huafeng）
A recovered coronavirus patient donates plasma at Changsha Blood Center in Changsha, central China's Hunan Province, Feb. 18, 2020. Cured patients who were infected with COVID-19 are called upon to donate plasma as initial results had indicated the effectiveness of convalescent plasma-derived therapeutic products in curing infected patients in severe and critical conditions. Some recovered patients regard the donation as a way to pay back to the society after they received timely and effective treatment. （Photo: China News Service/ Yang Huafeng）
A recovered coronavirus patient donates plasma at Changsha Blood Center in Changsha, central China's Hunan Province, Feb. 18, 2020. Cured patients who were infected with COVID-19 are called upon to donate plasma as initial results had indicated the effectiveness of convalescent plasma-derived therapeutic products in curing infected patients in severe and critical conditions. Some recovered patients regard the donation as a way to pay back to the society after they received timely and effective treatment. （Photo: China News Service/ Yang Huafeng）
A recovered coronavirus patient donates plasma at Changsha Blood Center in Changsha, central China's Hunan Province, Feb. 18, 2020. Cured patients who were infected with COVID-19 are called upon to donate plasma as initial results had indicated the effectiveness of convalescent plasma-derived therapeutic products in curing infected patients in severe and critical conditions. Some recovered patients regard the donation as a way to pay back to the society after they received timely and effective treatment. （Photo: China News Service/ Yang Huafeng）
