Dr. Gaffney is a pulmonary specialist at Cambridge Health Alliance at Harvard Medical School and is president of Physicians for a National Health Program (PNHP). He is also chair of the Massachusetts chapter of PNHP and co-chair of the Working Group on Single-Payer Program Design, which developed the “Physicians’ Proposal for Single-Payer Health Care Reform,” recently published at the American Journal of Public Health. Dr. Gaffney is a prolific writer and blogger on health policy, frequently appears on radio, and is the author of “To Heal Humankind: The Right to Health in History.”