This gives the dust a chance to settle after vacuuming and changing sheets. However, dodging second hand smoke while standing in the taxi lines at most metropolitan airports and train stations is still a tough one to overcome. Electric hookups make it possible to take a breathing treatment using a portable nebulizer if needed. Drink lots of water during the flight. If you have food allergies, prearrange special diet requests with the airline or travel agent or bring your own food.
Some airlines use deodorizing air sprays that can irritate sensitive airways.