Clover Biopharmaceuticals, Ltd., a biotechnology company, engages in the research and development, manufacture, and commercialization of vaccines in Mainland China. Its product candidates include SCB-2019 (CpG 1018/Alum), a COVID-19 vaccine; AdimFlu-S (QIS), a quadrivalent split inactivated vaccine for the treatment of influenza A and B; SCB-219M, a thrombopoietin receptor agonist mimetic bispecific Fc-fusion protein to tre