How is mechanism of action of RNA-based vaccines Moderna and Pfizer COVID?

MRNA encoding the target protein only, enclosed in a lipid nanoparticle The mRNA is injected in muscle cells -> It is translated in target protein , then disintegrates afterwards -> Large numbers of target protein molecules are produced by the cell and recognized by B and T cells -> The immune system makes protein-specific antibodies and Cytotoxic T cells and is ready to make more if it encounters the virus