Moderna has announced that a Phase III trial of 'mRNA-1283', its new-generation Covid-19 vaccine currently under investigation, has met its primary efficacy endpoint, demonstrating non-inferior vaccine efficacy against COVID-19 compared with Spikevax.

The company also announced that efficacy was higher in adults aged 18 and over compared with Spikevax (mRNA-1273), with a consistent trend observed in the subgroup of adults aged 65 and over.

In the trial, mRNA-1283 showed a similar safety profile to Spikevax.

The company plans to present the Phase 3 clinical data for mRNA-1283 at an upcoming conference and submit them for publication. The company will also engage in discussions with regulators on the next steps in the program.

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