It is often said, public health outside dry hands dirty, even "equal to white wash the wash." But because it did not want to hand dripping, and no paper towels, sometimes still inevitably use it. Now there is new evidence that these seemingly clean machine really dirty.
According to one study, "Clinical Journal of Infection" (Journal of Hospital Infection) on the University of Leeds researchers had volunteers on hand painted with ink, and then were to use paper towels, a hot air hand dryers (warm-air dryers) and jet hand dryer (jet dryers) comparison test - high visibility ink may allow researchers to easily find out which way the minimum transmission range of bacteria.
The following picture is a hot air hand dryer's performance, you can see a wide range of dry hands to put the bacteria spread to the other surface.
In another part of this experiment, the researchers also volunteers on hand painted Lactobacillus - a kind of "friendly" bacteria, and then let them dry again with the three way hand, then tested around air, the final result is jet hand dryer in the air near the left than a hot air hand dryer 4.5 times more bacteria than retro tissue is left 27 times more bacteria.
Although on paper towel between public health and environmental protection are some handy controversy, but from a health point of view, they are still the best choice.
(Compiled: keep_ via scienceofus)
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