Moderna Reports Second Quarter Fiscal Year 2021 Financial Results and Provides Business Updates Moderna COVID-19 Vaccine mRNA-1273: Final blinded analysis of Phase 3 COVE study shows 93% efficacy; Efficacy remains durable through six months after second dose Moderna booster candidates demonstrate robust antibody responses to COVID-19 variants of concern in Phase 2 Dosing started in Phase 1 studi