Pharmaceutical companies Merck and Moderna reported that an experimental personalized mRNA vaccine, given alongside the immunotherapy drug Keytruda, reduced the risk of melanoma recurrence or death by 42% compared with Keytruda alone.
The Phase 3 trial included 1,137 patients with Stage IIB-IV melanoma whose tumors had been surgically removed. The findings could bring the drugmakers closer to regulatory approval for the treatment.

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