Research roundup: Lowering health costs of the poorest sick; Local variations in heal
 

Olmstead County, Minn., which earlier required just restaurants to be smoke-free, enacted a law in 2007 that banned smoking in all workplaces. Researchers reported "a substantial decline in the incidence of MI from 18 months before the smoke-free restaurant law was implemented to 18 months after the comprehensive smoke-free workplace law was implemented 5 years later.

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