rising rate of measles CDC http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6322a4.htm Amish in Ohio a catastrophic effect unvaccinated by choice much more of a threat Amish in Ohio Measles – United States, January 1 – May 23, 2014 http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6322a4.htm Measles — United States, January 1–May 23, 2014