Asthma statistics in Michigan, available by state or county - http://getasthmahelp.com/main_statistics.asp

Asthma on the CDC website:  http://www.cdc.gov/health/asthma.htm

Asthma Fact Sheet:  http://www.michigan.gov/documents/Asthma_factsheet_6385_7.pdf

Michigan Department of Community Health Asthma web page:  http://www.michigan.gov/mdch/0,1607,7-132-2945_5104-13055--,00.html