Communities are working to change social and environmental issues that affect health.
Harvard T. H. Chan School of Public HealthYouTube
Health is more than the sum of its parts. Sometimes in surprising ways, factors such as childhood experiences, housing conditions, poor diets and health care access drive who ends up sick — and who does not.
As part of our series "What Shapes Health," created in partnership with the Robert Wood Johnson Foundation and the Harvard T.H. Chan School of Public Health, Harvard sponsored a webcast on the question.