All three were funded by grants from the Environmental Protection Agency and the National Institute of Environmental Health Sciences, among other sources.

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Researchers at the National Institute of Environmental Health Sciences and the University of Iowa recently found that bacteria in household dust are a major problem for asthma sufferers.

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Becker is a professor of Community and Environmental Health, College of Health Sciences, at Old Dominion University in Norfolk, Virginia.

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According to the National Institute of Environmental Health Sciences, roaches "are common even in the cleanest of crowded urban areas and older dwellings" and are found in all types of neighborhoods.

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