RNA-based vaccine mRNA encoding spike protein (100 μg) Moderna(mRNA-1273) Two doses (day 0, day 28) Intramuscular Post-EUA Lipids (SM-102; 1,2-dimyristoyl-rac-glycero-3-methoxypolyethylene glycol-2000 [PEG 2000-DMG]; cholesterol; and 1,2-distearoyl-sn-glycero-3-phosphocholine [DSPC]), tromethamine, tromethamine hydrochloride, acetic acid, sodium acetate, and sucrose