Airplanes and airports are breeding grounds for germs, thanks to the large numbers of people who pass through them every day.
And it's not just the bathrooms that collect germs.
Travelmath sent a microbiologist to four airplanes and five airports to gather samples and determine the dirtiest surfaces.
Surprisingly, an airplane's tray table took the number one spot as the most unhygienic surface.
Other surfaces to avoid include the toilet flush button and the overhead air vent.
Take a look at the infographic below to see the full results.
