John M. Balbus, M.D., M.P.H., is the Senior Advisor for Public Health to the Director of the National Institute of Environmental Health Sciences, where he directs the NIEHS-WHO Collaborating Centre for Environmental Health Sciences. He serves as HHS Principal to the U.S. Global Change Research Program and also co-chairs working groups on Climate Change and Human Health for the US Global Change Research Program and for the National Institutes of Health. Balbus was co-convening lead author for the 4th US National Climate Assessment as well as a lead author on the GCRP Special Report on the Health Impacts of Climate Change in the United States. He is co-author of the HHS guide document “Primary Protection: Enhancing Health Care Resilience for a Changing Climate.”