Conversely, strong evidence exists regarding the efficacy of protein-based vaccines such as recombinant-protein, viral-vector, attenuated, or inactivated vaccines across different infectious diseases, with licensed vaccines already existing for all of these platforms.27 All of the aforementioned approaches are currently being explored in the context of SARS-CoV-2.27 An inactivated vaccine developed by the China National Pharmaceutical Group (Sinopharm), in collaboration with the Wuhan Institute of Biological Products, is currently tested in a Phase I/II trial (ChiCTR2000031809), and a second inactivated vaccine (in collaboration with the Beijing Institute of Biological Products) has been currently approved for clinical testing (ChiCTR2000032459).