Did you know that there is a one in five chance of developing colds, flu and respiratory infection among all passengers who fly? A major reason is the failure of the bodys Mucociliary Clearance System which is its natural defence system that helps move nasal viruses and bacteria to the stomach where they are destroyed by stomach acids. In the enclosed environment of an aircraft cabin, aircraft cabin air is recycled, low in oxygen with low humidity levels of less than 20%. The combined effects of dry and recycled air, strips away the protective coatings of the nasal passages and dries and thickens nasal mucus making you more vulnerable to germs exhaled by other passengers and increases the chance of developing respiratory infection.