File:Asthma prevalence.png

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Asthma prevalence in children has increased since 1980, especially in younger children. In 2001, around 6 million (or 9 percent) U.S. children 18 years old and younger had asthma, compared to approximately 3.6 percent of children in 1980. However, the number of children having asthma attacks seems to have leveled off in the period between 1997 and 2001.

Image from http://www.epa.gov/indicators/roe/html/roeHealthSt2.htm.

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