Drugmaker Moderna has completed its initial efficacy analysis of its COVID-19 vaccine from the drug's Phase 3 clinical study, and determined that it was 94.1% effective in preventing people from contracting COVID-19 across 196 confirmed cases from among 30,000 participants in the study. Moderna also found that it was 100% effective in preventing severe cases (such as those that would require hospitalization) and says it hasn't found any significant safety concerns during the trial. On the basis of these results, the company will file an application for emergency use authorization (EUA) with the U.S. Food and Drug Administration (FDA) on Monday.
Seeking an EUA is the next step toward actually beginning to distribute and administer Moderna's COVID-19 vaccine, and if granted the authorization, it will be able to provide it to high-risk individuals in settings where it could help prevent more deaths, such as with front-line healthcare workers, ahead of receiving a full and final regulatory approval from the U.S. healthcare monitoring agency. Moderna will also seek conditional approval from the European Medicines Agency, which will enable similar use in the EU.
Moderna's vaccine is an mRNA vaccine that provides genetic instructions to a person's body that prompts them to create their own powerful antibodies to block the receptor sites that allow COVID-19 to infect a patient. It's a relatively new therapeutic approach for human use, but has the potential to provide potentially even more resistance to COVID-19 than do natural antibodies, and without the risk associated with introducing any actual virus, active or otherwise, to an inoculated individual in order to prompt their immune response.
In mid-November, Moderna announced that its COVID-19 vaccine showed 94.5% efficacy in its preliminary results. This final analysis of that same data hews very close to the original, which is promising news for anyone hoping for an effective solution to be available soon. This data has yet to be peer reviewed, though Moderna says it will now be submitting data from the Phase 3 study to a scientific publication specifically for that purpose.
Moderna's vaccine candidate is part of the U.S.'s Operation Warp Speed program to expedite the development, production and distribution of a COVID-19 vaccine, initiated earlier this year as a response to the unprecedented pandemic. Other vaccines, including one created by Pfizer working with partner BioNTech, as well as an Oxford University/AstraZeneca-developed candidate, are also far along in their Phase 3 testing and readying for emergency approval and use. Pfizer has already applied with the FDA for its own EUA, while the Oxford vaccine likely won't be taking that step in the U.S. until it completes another round of final testing after discovering an error in the dosage of its first trial -- which led to surprising efficacy results.