SK bioscience Co., Ltd. researches, develops, produces, and distributes vaccines and biopharmaceuticals in Korea and internationally. Its portfolio includes Skycellflu, a cell-cultured influenza surface antigen vaccine; Skycellflu 4-ga pre-filled syringe; pneumococcal vaccines for adults and infants; Skyzoster, a shingles virus vaccine; and Sky Baricella for the prevention of chickenpox in children. The company is also developing an oral rotavirus vaccine and a cervical cancer vaccine, both of which have completed phase 2 clinical trials, a rotavirus vaccine in phase 3 trials in Africa, a typhoid conjugate vaccine, a Corona 19 vaccine in phase 1 and phase 1/2 trials, a low-cost pneumococcal vaccine that has completed phase 2 trials, and a next-generation pneumococcal vaccine in phase 2 trials in the United States. Founded in 2018 and based in Seongnam-si, South Korea, SK bioscience Co., Ltd. is a subsidiary of SK Chemicals Co., Ltd.