Everyone knows that being sick is not the best way to start off a holiday. However with all that traveling to the airport, sitting in the unhealthy environment that is the airplane cabin, using pushcarts that thousands of other people have touched, it’s almost impossible not getting sick from flying. Airports are magnets for an array of bacteria and viruses, but there are certain guidelines that people should follow in order to stay as healthy as possible during their travels.
Altitude sickness is not generally a problem below 3000m. The secret to avoiding it is to walk at your own pace and take adequate rest days. Sedatives and alcohol aggravate altitude headache. Most walking in Nepal is up and down and a lot of it is steps. Try and do a lot of pre-trip exercise on steps. My trekking schedules have been carefully designed to minimise the effects of altitude.