We have sad news of the passing of Mariel Vazquez on July 5th, 2026. We have lost a great friend and colleague. Mariel was a world class applied mathematician, and earned many recognitions for her notable contributions to mathematical biology. She was also a caring dedicated teacher and mentor who fought for opportunities and access to great education for all. In these difficult times we offer our condolences to her family and in particular to her husband, our colleague Javier Arsuaga, and their children.