Moderna Completes Enrollment in Phase III COVID-19 Vax Study

Moderna, Inc. has completed enrollment of 30,000 participants for the Phase 3 COVE study of mRNA-1273, its COVID-19 vaccine candidate, being conducted in collaboration with the National Institutes of Health (NIH) and the Biomedical Advanced Research and Development Authority (BARDA). To date, more than 25,650 participants have received their second vaccination. Moderna will determine whether to submit a dossier to FDA requesting Emergency Use Authorization based on an assessment of whether the potential benefit of the vaccine outweighs the potential risks once the 2 months of median safety follow-up have accrued.

Moderna worked closely with BARDA and the NIH, including NIAID’s COVID-19 Prevention Network (CoVPN), to conduct the Phase 3 COVE study under Operation Warp Speed. Moderna’s partner PPD, a contract research organization providing drug development, laboratory and lifecycle management services, has also been essential to the successful execution to date of the COVE study. PPD also supported the Phase 2 study of mRNA-1273.

The Phase 3 COVE study was designed in collaboration with the FDA and NIH to evaluate Americans at the highest risk of severe COVID-19 disease. As of today, the COVE study includes more than 7,000 Americans over the age of 65. It also includes more than 5,000 Americans who are under the age of 65 but have high-risk chronic diseases that put them at increased risk of severe COVID-19, such as diabetes, severe obesity and cardiac disease. These medically high-risk groups represent 42% of the total participants in the Phase 3 COVE study.

The randomized, placebo-controlled Phase 3 trial is studying mRNA-1273 at the 100 μg dose level in 30,000 participants in the U.S. The primary endpoint is the prevention of symptomatic COVID-19 disease. Key secondary endpoints include prevention of severe COVID-19 disease and prevention of infection by SARS-CoV-2. The target vaccine efficacy against symptomatic COVID-19 disease which was used for powering assumptions is 60%. Data will be reviewed by an independent Data Safety Monitoring Board (DSMB) chartered by NIH. Formal study efficacy analysis will be triggered at 151 cases, with two earlier, interim analyses after 53 and 106 cases.