Novavax (sponsored by Bill Gates), also referred to as Cov2373, is a nanoparticle encapsulated antigen protein. Has full-length spike (S) protein of the SARS-CoV-2 virus as the antigen, from Moth cells (Moth like butterfly). Adjuvant - Matrix-MTM. They say the NVX-CoV2373 protein cannot replicate and cannot cause COVID-19.