Some newer vacuum cleaners have high-efficiency particulate air filtration (HEPA) filters attached, which, when combined with the special bags, are effective in trapping almost 100% of allergens, including ragweed, dust mites, and grass pollen.
Reed is allergic to dust mites, oak pollen, tropical grasses, and various plant enzymes, including bromelin, which, ironically, is found in pineapple, his favorite food.
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A randomized, double-blind, placebo-controlled cross-over study by the University Medical Center Groningen reported that dishydrosis outbreaks on the hands increased significantly among those allergic to house dust mites, following inhalation of house dust mite allergen.