You may think that you are being hygienic when washing your hands and using hot-air dryers in public restrooms. You’re right, but there is a hidden risk in thе story. Scientists suspect that hand dryers are able to dump lots of bacteria on our newly washed hands. And it turns out that they aren’t safe for each and every one of us.
To find out if it’s true or not, researchers at the University of Connecticut and Quinnipiac University exposed several Petri dishes to restroom air under different conditions and then checked them in the laboratory.
The results showed that the Petri dishes left inside bathrooms for 2 minutes with the hand dryers off had about one bacterial colony. But turning a hand dryer on for 30 seconds changed the situation with the other plates. Those samples had as many as 18–60 colonies of germs.
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