Public Health

Every day the Air Quality Index (AQI) tells you how clean or polluted your outdoor air is, along with associated health effects that may be of concern. The AQI translates air quality data into numbers and colors that help people understand when to take action to protect their health.

This is a digital library collection that brings a unique set of resources from Harvard’s libraries to Internet users everywhere. Offering valuable insights to students of the history of medicine and to researchers seeking an historical context for current epidemiology, the collection contributes to the understanding of the global, social–history, and public–policy implications of disease. Contagion is also a unique social–history resource for students of many ages and disciplines.

U.S. Library of Medicine

U.S. Department of Health and Human Services

Through HCCI, researchers have access to health care cost and utilization data that covers all ages and health issues, is national in nature, and includes previously inaccessible data on the private health insurance market. Researchers and policymakers are able to use the data to study the health care system, evaluate existing and new ways to contain costs, and assess quality.

Healthy People provides science-based, 10-year national objectives for improving the health of all Americans.

U.S. Department of Health and Human Services

U.S. National Insitutes of Health, National Institute on Aging amd National Library of Medicine

For more than 40 years, the Robert Wood Johnson Foundation has worked to improve the health and health care of all Americans. As the nation's largest philanthropy devoted solely to the public's health, we have a unique capacity and responsibility to address the most pressing health and health issues facing our society.

List chemical toxins based on enviromental locations with medical implications