Moderna highlights new clinical data on its COVID-19 vaccine

• mRNA-1273 remains highly effective against COVID-19 in real-world effectiveness study during surge in Delta cases
• New analysis of open-label portion of Phase 3 COVE study shows lower risk of breakthrough infection in participants vaccinated more recently (median 8 months after first dose) than participants vaccinated last year (median 13 months after first dose)
• Company believes data support benefit of an mRNA-1273 booster dose

CAMBRIDGE, Mass.–Sep. 15, 2021– Moderna, Inc. (Nasdaq: MRNA), a biotechnology company pioneering messenger RNA (mRNA) therapeutics and vaccines, today highlighted a new analysis suggesting that the Moderna COVID-19 vaccine is highly effective against circulating variants of concern, including in a vaccine effectiveness study conducted in partnership with Kaiser Permanente Southern California (KPSC) and in a separate recent publication by the U.S. Centers for Disease Control and Prevention (CDC). Additionally, the Company shared a new analysis of follow-up through 1 year in the Phase 3 COVE study suggesting a lower risk of breakthrough infection in participants vaccinated more recently (median 8 months after first dose) compared to participants vaccinated last year (median 13 months after first dose). Manuscripts summarizing both findings have been posted to preprint servers and will be submitted for peer-reviewed publication.

Read the full press release here.