PRESS RELEASE CHICAGO – Addressing the re-emergence of vaccine preventable illnesses in the United States requires states to go toward barring nonmedical exemptions to immunization mandates, according to new plan adopted by the nation's physicians at the American Medical Association's annual conference. Under new policy, the AMA shall seek even more stringent state immunization requirements to permit exemptions only for medical reasons. Immunization programs in the U . S are credited with having eliminated or controlled the pass on of epidemic diseases, including smallpox, measles, mumps, rubella, diphtheria and polio. Immunization requirements vary from state to state, but only two claims bar nonmedical exemptions predicated on personal beliefs.