SK bioscience Co.,Ltd. engages in the research and development, production, and distribution of vaccines and biopharmaceuticals in Korea and internationally. Its product portfolio includes Skycellflu, a cell cultured influenza surface antigen vaccine; Skycellflu 4-ga pre-filled syringe; pneumococcal vaccine for adult and infant; Skyzoster, a shingles virus vaccine; and Sky Baricella for the prevention of chickenpox infection in children. The company also engages in the development of oral rotavirus vaccine that has completed phase 2 clinical trial; cervical cancer vaccine, which has completed phase 2 clinical trial; rotavirus vaccine that is in phase 3 clinical trial in Africa; typhoid conjugate vaccine; and Corona 19 vaccine that is in phase 1 and phase 1/2 clinical trials; and low-cost pneumococcal vaccine, which has completed phase 2 clinical trial and next-generation pneumococcal vaccine that is in phase 2 clinical trial in the United States. SK bioscience Co.,Ltd. was founded in 2018 and is based in Seongnam-si, South Korea. SK bioscience Co.,Ltd. is a subsidiary of SK Chemicals Co.,Ltd.