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Hepa filters do prevent spread of airborne disease by trapping the germs, killing them by ultraviolet rays transmitted through them, indirectly these filters will help prevent heart disease as lungs and heart is one unit, if respiratory infections/ allergies / low levels of oxygen because of these does trigger a heart attack. Peanut allergies can be as serious as any other type of allergies but not deadly like sulfa / penicillin.
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