Male nurse Yi Junfeng (L) , who volunteered to join the battle against the epidemic, collects swab sample from a patient at a fever clinic of Hunan People's Hospital in Changsha, central China's Hunan Province, Feb. 7, 2020. The International Nurses Day is celebrated around the world May 12, on the occasion of Florence Nightingale's birthday. The theme this year chosen by the International Council of Nurses is "Nursing the World to Health". (Xinhua/Chen Zeguo)