NCIt definition : An engineered protein subunit vaccine composed of an Fc fusion protein of the severe
acute respiratory syndrome coronavirus-2 (SARS-CoV-2) spike (S) protein receptor binding
domain (RBD) antigen and human immunoglobulin G1 (IgG1) Fc, with potential immunizing
activity against SARS-CoV-2. Upon administration of the SARS-CoV-2 protein subunit
vaccine AKS-452, the S protein activates the immune system to create anti-SARS-CoV-2
S protein antibodies. The antibodies recognize and neutralize the S protein and kill
SARS-CoV-2. This prevents SARS-CoV-2 infection. S protein, usually found on the surface
of SARS-CoV-2, plays an essential role in the infection pathway of the SARS-CoV-2
virus.;