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Asthma affects more than 24 million children and adults in the United States. There are large racial, income, and geographic disparities apparent in asthma prevalence. Those living below 100% of the federal poverty level and Blacks are most impacted by this chronic disease.

Tracking the number of people diagnosed with asthma, hospital stays or emergency room visits, and the number of deaths in a community due to asthma proves useful in estimating the geographic distribution of and populations most effected by asthma. This information will be useful in planning and evaluating asthma interventions.