| http://www.w3.org/ns/prov#value | - Causes and Risk FactorsMany types of dust, organisms or chemicals can cause allergic reactions in the lungs, including:Heat-loving bacteria in moldy hayContamination in humidifiers or air conditions (especially large systems in office buildings)Chemicals, such as urethanes (isocyanates)Wood dustDroppings from poultry or other birds.Chemicals used in making polyrethane foam, molding, insulation, sy
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