Healthwatch

My column usually extols the virtues of travel. It is an opportunity to expand horizons, increase cultural awareness, practice language skills and regenerate. This month, however, I find it my unfortunate duty - as the unchallenged authority on IR business travel - to report on the health hazards of flying. Beyond the psychological indignities of scheduling, packing, check-in, securing items in cramped overhead bins and so on, airplanes can overwhelm the healthiest of immune systems.Consider