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Did They Just Cure Cancer?

Summary

• Merck and Moderna reported positive Phase 3 results for intismeran autogene, an individualized mRNA cancer vaccine.

• The result marked the first positive Phase 3 readout for a personalized neoantigen therapy.

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Merck and Moderna reported positive Phase 3 results for intismeran, their personalized cancer vaccine, when used with KEYTRUDA in melanoma patients who had undergone surgery.

Intismeran is personalized using mutations found in each patient’s tumor. Researchers analyze the tumor, then create an mRNA treatment designed to target up to 34 tumor specific markers. In the Phase 3 trial, Intismeran combined with KEYTRUDA significantly improved how long patients remained cancer free and reduced the risk of cancer spreading compared with KEYTRUDA alone.

The trial met its main goals early, marking the first positive Phase 3 result for an individualized mRNA cancer therapy. Professor Georgina Long, the trial’s principal investigator, called the results a “landmark moment for adjuvant melanoma treatment.”

Moderna stock, MRNA surged over +100% following the trial results. The Kobeissi Letter highlighted the move in a post about the announcement.

The Kobeissi Letter
The Kobeissi Letter
@KobeissiLetter
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BREAKING: Moderna stock, $MRNA, surges over +110% after announcing the first ever positive Phase 3 results for a personalized cancer vaccine.

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12:08 PM · Aug 19, 2026
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CNN also posted about the trial results, bringing the story a wider audience.

@StockMKTNewz posted the story to over 1M followers.

Intismeran launched on Pump fun on August 19 and reached a $2.5M market cap in under an hour.

CNN
CNN
@CNN
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Moderna’s mRNA vaccine combined with Merck’s immunotherapy Keytruda succeeded in a late-stage trial for skin cancer, the companies said, sending shares of the vaccine maker up 60% in premarket ​trading. cnn.it/4qqzOQ0

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12:20 PM · Aug 19, 2026
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Evan
Evan
@StockMKTNewz
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MERCK $MRK AND MODERNA $MRNA JUST HIT THE FIRST POSITIVE PHASE 3 RESULT EVER FOR A PERSONALIZED CANCER VACCINE Their Phase 3 INTerpath-001 trial found that "intismeran autogene, an mRNA therapy custom-built from each patient's own tumor mutations, combined with Merck's KEYTRUDA,

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10:55 AM · Aug 19, 2026
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