There are many people who travel as part of their job.  They travel a lot.  The majority of that traveling is  done on airplanes.  Everyone has heard that close quarters on an airplane can increase the chances of getting sick.  While most people focus on the re-circulated air in the plane, it is actually surface contact with seats, tray tables, and overhead storage bins that are breeding grounds for viruses.  Some suggest wiping down all of these surfaces before beginning your trip . . .paranoid, or smart?  You decide.  http://seattletimes.nwsource.com/html/travel/2014841080_webflightgerms24.html