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Event Brief
UPDATED Oct 23, 2026 at 5:00 AM ET
Oct 22, 2026 at 3:05 PM ET

Moderna and Merck release cancer vaccine trial data

By The BriefBrief
Moderna released full data on its cancer vaccine developed with Merck. The companies reported that the mRNA vaccine cut deaths and recurrence by 42%; the results follow an earlier announcement that the trial had succeeded.
WHO: Moderna and Merck
WHAT: Released full trial data for their mRNA cancer vaccine, with results showing a 42% reduction in deaths and recurrence.
WHEN: Oct 22, 2026
WHERE: United States
WHY: The companies released the full data after previously reporting that the trial succeeded.

Reporting from 3 identified publishers across this event arc.

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