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A Study to Evaluate the Efficacy, Safety, and Immunogenicity of mRNA-1647 Cytomegalovirus (CMV) Vaccine in Healthy Participants 16 to 40 Years of Age

Pelham, Alabama, 35124-6300
Phoenix, Arizona, 85015-1105
Phoenix, Arizona, 85018
Banning, California, 92220
Chula Vista, California, 91911-6617
Search open until 04/06/2026

The main purpose of this study is to evaluate the efficacy of mRNA 1647 vaccine in CMV-seronegative female participants and to evaluate the safety and reactogenicity of mRNA-1647 vaccine in all participants.


Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, learn about Clinical

Ages Eligible for Study Min Age: 16 Years - Max Age: 40 Years
Sexes Eligible for Study Female
Accepts Healthy Volunteers Yes

Visit ClinicalTrials.Gov for more information
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