Moderna shares fall after cancer vaccine data leak
By The BriefBrief
Moderna shares fell after data for its experimental cancer vaccine was reportedly leaked. Full Phase 3 data released later Thursday appeared positive against Wall Street expectations. Moderna and Merck were expected to share the data at a medical conference that weekend.
WHO:Moderna
WHAT:Moderna shares fell after a reported leak of data for its experimental cancer vaccine.
WHEN:Oct 22, 2026
WHERE:USA
WHY:A reported leak of cancer vaccine data preceded the fall in Moderna shares.
Reporting from 2 identified publishers across this event arc.
