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To the Editor.
—For more than 68 years, Kaz Inc has manufactured quality health care products, namely, vaporizers and humidifiers, to help relieve the symptoms of cold and flu.We are deeply disappointed in the recent publication of the two studies1,2 on the effect of inhaling heated vapor and hot humidified air on symptoms of the common cold. Both studies used a specialized steam device called the Rhinotherm, which shoots warm moist air directly up the nose through a nozzle. This device is not typical of the vaporizers and humidifiers commonly found in the marketplace.We strongly object to the broad objectives and conclusions set forth in the studies. We hope that THE JOURNAL will clarify the following points in the interest of accuracy and public safety: (1) The results of the studies were specific to the use of the Rhinotherm, not all vaporizers and humidifiers. (2) The Rhinotherm
Katzman L. The Common Cold: The Effect of Hot Humid Air on the Nasal Mucosa. JAMA. 1994;272(14):1103. doi:10.1001/jama.1994.03520140033028