I was rather taken aback by this report.
In 2014 a ... study by researchers from the University of Leeds found that airborne germ counts were 27 times higher around jet air dryers [in restrooms] in comparison with the air around paper towel dispensers.
Research lead Professor Mark Wilcox said: “Next time you dry your hands in a public toilet using an electric hand dryer, you may be spreading bacteria without knowing it. You may also be splattered with bugs from other people’s hands.
“These findings are important for understanding the ways in which bacteria spread, with the potential to transmit illness and disease.”
There's more at the link.
It's a yucky thought, particularly for those of us who travel by road and have to use gas-station and rest-stop restrooms, which are usually equipped with several hot-air hand-dryers. Looks like we may unknowingly be stepping into a highly contaminated atmosphere.
Food for thought . . .