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Moderna and Merck Just Made History With the First mRNA Cancer Vaccine to Succeed in a Phase 3 Trial. Here's What That Means for Investors.

The treatment combines an mRNA shot with Merck's Keytruda.

Moderna and Merck Just Made History With the First mRNA Cancer Vaccine to Succeed in a Phase 3 Trial. Here's What That Means for Investors.

Published August 19, 2026 · Category: Finance

Overview

A late-stage trial that combined a messenger ribonucleic acid (mRNA) shot jointly developed by Moderna (NASDAQ:MRNA) and Merck with Merck’s Keytruda yielded strong results in what's being viewed as a potential game-changing cancer treatment.

The Phase 3 trial enrolled over 1,100 patients with melanoma whose tumors had been completely removed by surgery.

Details

Patients who received the personalized vaccine alongside Keytruda went longer before their cancer returned, and longer before it spread to distant parts of the body, than patients who received Keytruda alone.

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Source

Originally published at www.fool.com.

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