[Possibilities and limitations of air travel]

The medical aspects of journeys by air are often of practical interest. They obviously depend on the constitution of each passenger. Their clinical picture varies considerably and may occassionally be severe. The incidence of such affections in civil aviation has not been determined, though experience shows that they are by no means rare. Evaluation of the harmful effects of flying must clearly take individual habits and histories must be taken into each account, since predisposing factors will lead to unusual features.