An experimental two-in-one vaccine, developed by Moderna, has shown promising results in an advanced clinical trial for both protecting against the flu and COVID-19. The combination shot, called mRNA-1083, produced higher immune responses to three subtypes of flu and SARS-CoV-2 in older adults compared to separate vaccines.
The ongoing trial includes adults ages 50 and older. Moderna announced the results on June 10, stating that the combined vaccine could offer a new option for boosting uptake of updated coronavirus vaccines and reduce the burden on health systems. The earliest the combined vaccine could hit the market is fall 2025, pending regulatory approval.
Moderna's combination COVID-19 and flu shot has shown positive results in a late-stage trial involving about 4,000 adults each in two age cohorts: those between 50 and 64 years old and those above 65. In both groups, the combination vaccine elicited higher immune responses against three influenza virus strains (H1N1, H3N2, and B/Victoria) and against SARS-CoV-2.
Combination vaccines could offer more convenient options for people who don't like getting multiple shots. Moderna is the only company with a positive Phase 3 flu and COVID combination vaccine. The company will engage with regulators on next steps for its combination vaccine, aiming to have it ready as early as 2025.
Moderna's competitors, Pfizer-BioNTech and Novavax, are also working on a combination shot. Pfizer-BioNTech said it was preparing a Phase 3 trial after getting positive topline results in earlier studies. Novavax's COVID and seasonal influenza vaccine is in the Phase 2 trial stage.