YS Biopharma Granted Patent in the U.S. for Immunotherapy Targeting Chronic Hepatitis B Virus Infection

GAITHERSBURG, Md., Sept. 15, 2023 /PRNewswire/ — YS Biopharma Co., Ltd. (NASDAQ: YS) (“YS Biopharma” or the “Company”), a global biopharmaceutical company dedicated to discovering, developing, manufacturing, and delivering new generations of vaccines and therapeutic biologics for…