16. ClinicalTrials.gov / U.S. National Library of Medicine. “NCT05085366: A Clinical Trial of a Cytomegalovirus (CMV) Vaccine.” Accessed August 28, 2025. Registry entry confirming phase, population, and endpoints for mRNA-1647.
17. Centers for Disease Control and Prevention. “COVID-19 Vaccine Basics: How mRNA Vaccines Work.” Updated September 3, 2024. Accessed August 28, 2025. Clear, authoritative primer supporting the plain-English mRNA explainer.