Coughing and Sneezing at High AltitudeNow here's a bad combination: You haven't gotten a flu shot and you're traveling by some form of mass transit over the holidays. Either get your vaccine now or cross your fingers for luck. According to public health authorities, this year's flu season has started exceptionally early, and being in packed airplanes or trains is bound to hasten the spread of illness.
Source: Coughing and Sneezing at High Altitude (http://news.yahoo.com/coughing-sneezing-high-altitude-185643181.html)