Published in Medical Letter on the CDC and FDA, January 16th, 2005
"Seasonal allergies and microbial mediated respiratory diseases can coincide with elevated particulate matter concentrations, often when dry desert soils are disturbed. In addition to effects from the allergens, allergic and asthmatic responses may be enhanced when chemical and biological constituents of particulate matter (PM) are combined together.
"Because of these associations and also the recent regulatory and health-related interests of monitoring PM2.5, separately from total PM10, the biological loading between the fine (d(p) <2.5 mcm) and coarse (2.5 mcm...
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