Sourced News

Atom Brief

Tue, Jul 21, 2026 · 64 stories · Confirmed · Subscribe
Science

Moderna Doses First Patient In Phase 1 mRNA-4200 Trial

The mRNA-4200 candidate primes the immune system against tumor antigens in ten solid-tumor types, alone and with Keytruda.

  • Trial NCT06880549 aims to enroll 42 patients across sites in Michigan, Texas and Utah.
  • A parallel arm tests mRNA-4106, Moderna's related cancer-antigen candidate, as a standalone therapy.
  • Primary endpoints track dose-limiting toxicities and adverse events through two years, three months.

Why it matters: A dose-finding study of forty-two patients measures whether the injection is safe, not whether it cures anything.

Moderna (press release via ACCESS Newswire) / ClinicalTrials.gov NCT06880549 ↗ · Jul 21, 20267/21/26 · ✓ Checked✓ Check