Ruth Gil-Prieto is a Professor of Preventive Medicine and Public Health at Rey Juan Carlos University (URJC) in Madrid. Originally trained as a biochemist, she pursued a Ph.D. in epidemiology and public health, driven by her passion for humanitarian medicine and development. This led her to specialize in infectious disease epidemiology, with a particular focus on vaccines. After serving as an adjunct professor, she conducted research in the pharmaceutical industry, closely monitoring the clinical development of several vaccines. In 2010, she secured tenure at URJC, where she currently teaches epidemiology and previously served for seven years as the Director of the International Cooperation and Volunteering Program. Additionally, she was a Visiting Associate Professor at Harvard Medical School’s Department of Population Medicine in Boston, where her research centered on vaccine safety. She is fluent in Spanish, English, French, and German.