Moderna, Merck claim melanoma vaccine halves recurrence risk in Phase III trial

Moderna, Merck claim melanoma vaccine halves recurrence risk in Phase III trial

Moderna and Merck said their personalized mRNA melanoma vaccine, intismeran autogene, cut the risk of disease recurrence or spread in a Phase III trial of 1,137 high-risk patients, with the results unveiled at the American Society of Clinical Oncology meeting in Chicago on August 17. Earlier reports from Gizmodo and Ars Technica noted that the vaccine, given alongside Merck’s Keytruda, extended recurrence-free and distant metastasis-free survival. Yahoo Finance later observed that Moderna’s shares fell 12% in pre-market trading after a prior 177% surge on the same trial success.

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Moderna Merck Stéphane Bancel

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American Society of Clinical Oncology meeting

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August 24, 2026
1 total
Moderna and Merck report melanoma vaccine cuts recurrence risk in trial of 1,137 patients
Moderna and Merck report melanoma vaccine cuts recurrence risk in trial of 1,137 patients

STAT • 24 Aug 08:35

A phase III study of the mRNA-based melanoma vaccine intismeran autogene showed a statistically significant reduction in the chance of disease recurrence or spread, according to results released by Moderna and Merck.

Credibility 72% Manip. 8% Center
August 20, 2026
2 total
Moderna and Merck report positive Phase 3 results for melanoma mRNA vaccine
Moderna and Merck report positive Phase 3 results for melanoma mRNA vaccine

Gizmodo • 20 Aug 16:15

A Phase 3 trial showed that adding Moderna's personalized mRNA vaccine to Merck's Keytruda immunotherapy extended recurrence-free survival in high-risk melanoma patients.

Credibility 72% Manip. 32% Center
Moderna shares dip after soaring on mRNA cancer vaccine trial success
Moderna shares dip after soaring on mRNA cancer vaccine trial success

Yahoo Finance • 20 Aug 09:10

Moderna's stock fell 12% in pre-market trading following a 177% jump on news that its mRNA melanoma vaccine met primary endpoints in a Phase 3 trial, prompting mixed reactions from analysts.

Credibility 72% Manip. 9% Center
August 19, 2026
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Moderna and Merck report mRNA vaccine improves recurrence-free survival in melanoma Phase 3 trial
Moderna and Merck report mRNA vaccine improves recurrence-free survival in melanoma Phase 3 trial

Ars Technica • 19 Aug 16:53

A late-stage study of 1,137 melanoma patients showed that a personalized mRNA vaccine combined with Keytruda extended recurrence-free and distant metastasis-free survival, according to Moderna and Merck.

Credibility 78% Manip. 12% Center
Moderna and Merck report experimental melanoma vaccine delays recurrence in late-stage trial
Moderna and Merck report experimental melanoma vaccine delays recurrence in late-stage trial

NBC News • 19 Aug 14:37

An mRNA-based personalized vaccine combined with Merck's Keytruda showed interim evidence of extending disease-free time for high-risk melanoma patients, according to a company release.

Credibility 68% Manip. 12% Center