Keeping cold-water humidifiers clean.
D001249:Asthma / Q000628:therapy; D001991:Bronchitis / Q000628:therapy; D003080:Cold Temperature; D006801:Humans; D006813:Humidity; D011196:Potassium Permanganate; D011656:Pulmonary Emphysema / Q000628:therapy
D011196:Potassium Permanganate