Does an air humidifier help prevent the common cold?
Expert opinions vary on whether dryness of the nasal passage is a contributory factor of developing cold symptoms. The National Institute of Allergy and Infectious Diseases reports that dryness may make the lining of the nose more vulnerable to infection, but other experts say that even if the nose feels dry, the mucus membranes inside the nose are still moist. And, that, once again, if the virus enters the nose, most people will become infected.
