On January 13, the “12th month of unpaid blood donation of medical personnel” in Kunming was held in the third people’s Hospital of Yunnan Province. By 4 p.m., more than 300 medical personnel had participated in blood donation, with a blood donation volume of nearly 78000 ml. Every year before and after the Spring Festival, college holidays, migrant workers returning home and holidays, and COVID-19 prevention and control work, the number of blood donors will be greatly reduced, and blood inve...