NCIt definition : A formulation consisting of lipid nanoparticle (LNP) encapsulating a nucleoside modified
messenger RNA (modRNA) encoding an optimized form of the full-length viral spike (S)
glycoprotein of the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) Omicron
variant lineages BA.4 and BA.5 (Omicron BA.4/BA.5), with potential immunizing and
anti-COVID-19 activities. Upon administration of famtozinameran, the LNPs bind to
the plasma membrane of nearby cells and release SARS-CoV-2 S protein mRNA into the
cells. The mRNA is then translated by the cellular protein translation machinery to
produce SARS-CoV-2 S protein. This may activate both humoral and cellular immune responses
which may result in protection against SARS-CoV-2 infection.;