Moderna Announces First Participant Dosed in Phase 1 Clinical Trial Evaluating Investigational Tumor-Targeted Cancer Antigen Therapy in Solid Tumors

CAMBRIDGE, MA / ACCESS Newswire / July 16, 2026 / Moderna, Inc. (NASDAQ:MRNA) today announced the dosing of the first U.S. participant in its Phase 1 study evaluating mRNA-4200, a tumor-targeted cancer antigen therapy candidate, in patients with advanced or metastatic solid tumors. mRNA-4200 encodes for seven antigens commonly shared across patients and tumor types and is designed to help induce and expand T-cell responses against selected tumor targets.

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