Dr. Mary Hayden, a medical anthropologist and Research Professor with the Lyda Hill Institute for Human Resilience at the University of Colorado in Colorado Springs, joins John to explore how human behavior and water insecurity are reshaping the spread of mosquito-borne disease. With fieldwork spanning the U.S. and Latin America, Mary shares how climate change is expanding disease risk into new regions -- and why public health strategies must go beyond spraying to include education, trust, and community action.

Dr. Dawn Wesson, Associate Professor at Tulane University’s School of Public Health and Tropical Medicine, joins John to explore how climate change is expanding the range of vector-borne diseases. With decades of experience studying mosquito-borne viruses like West Nile and Zika, Dawn explains how rising temperatures and human movement are accelerating the northward expansion of tropical diseases. She also discusses innovative control strategies, including biological methods and emerging technologies that could help reduce disease transmission in a warming world.