Moderna's mRNA-1083: Promising Phase III Results

Moderna's mRNA-1083: Promising Phase III Results

Marina López
2 min read

Moderna's mRNA-1083 Shows Strong Immune Response in Phase III Trial

Moderna has revealed encouraging findings from the Phase III trial of its mRNA vaccine candidate, mRNA-1083, which integrates a seasonal flu vaccine with a next-generation Covid-19 vaccine. The trial exhibited that a single injection of mRNA-1083 prompted a more robust immune response against both illnesses in comparison to separate vaccinations. In terms of safety, the vaccine was found to be non-inferior to licensed vaccines, with common side effects such as injection site pain, fatigue, and headache. Highlighting the potential of combination vaccines to ease the burden of respiratory viruses and provide more convenient vaccination options, Moderna's CEO, Stéphane Bancel, foresees presenting detailed results at an upcoming medical conference and engaging with regulators for further progress.

Key Takeaways

  • Moderna's mRNA vaccine, mRNA-1083, induced a stronger immune response against flu and Covid-19 in contrast to individual vaccines.
  • mRNA-1083 combines the mRNA-1010 seasonal flu candidate with the mRNA-1283 next-gen Covid-19 vaccine.
  • Results from the Phase III trial displayed non-inferiority and enhanced immune response against multiple virus strains.
  • The safety profile of mRNA-1083 aligns with that of existing licensed vaccines, with prevalent side effects including injection site pain and fatigue.
  • Moderna is the sole company conducting Phase III trials for a combined flu and Covid-19 vaccine.


Moderna's mRNA-1083, a fusion flu and Covid-19 vaccine, represents a breakthrough in vaccine convenience and effectiveness. Its success has the potential to streamline vaccination schedules, benefiting public health systems and vaccine manufacturers. The vaccine's non-inferior safety profile preserves consumer confidence. Immediate effects encompass increased vaccine uptake and decreased disease transmission. In the long run, mRNA-1083 may establish a precedent for multi-disease vaccines, thereby influencing global vaccine development strategies. Regulatory clearance could expedite given the vaccine's robust trial results and the pressing need for efficient immunization against respiratory viruses.

Did You Know?

  • mRNA Vaccine: mRNA vaccines employ messenger RNA (mRNA) to direct cells in the body to generate a virus-related protein, triggering an immune response without utilizing the live virus causing the disease. This technology enables rapid development and flexibility in targeting various pathogens.
  • Phase III Trial: In the pharmaceutical sphere, Phase III trials are extensive studies conducted after a drug or treatment has shown promise in Phase I and II trials. These trials aim to assess the efficacy and safety of the treatment in a larger population, often comparing it to existing treatments or placebos, to determine its overall benefit-risk profile.
  • Non-inferiority: In clinical trials, non-inferiority indicates that a new treatment is not inferior to an existing treatment by more than a specified margin. This is crucial for treatments, such as vaccines, where the objective is to ensure that new formulations maintain at least the same level of safety and efficacy as current standards.

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