Changes in SARS-CoV-2 antibody levels after component preparation of COVID-19 convalescent plasma 
LIU Yang, YAN Bing, AI Jun, BAO Jingjing, ZHANG Libo, FU Qiang, ZHANG Chun, CHEN Yun, WANG Yong
Journal of Tropical Diseases and Parasitology . 2025, (5): 301 -305 .