Moderna Inc

MRNA: XNAS (USA)

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Moderna: Failure of Cytomegalovirus Vaccine Further Increases Pressure on Oncology Pipeline

Karen Andersen

Oct 23, 2025

On Oct. 22, Moderna announced that its cytomegalovirus vaccine candidate mRNA-1647 failed to show significant efficacy in a phase 3 trial for congenital CMV. Shares fell 4% after hours.

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Moderna Inc

Moderna: Failure of Cytomegalovirus Vaccine Further Increases Pressure on Oncology Pipeline

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