The commonplace greeting of a handshake could be on the way out if some infection control experts have anything to say about it. Researchers at the Institute of Biological, Environmental and Rural Sciences at Aberystwyth University in Wales write that the handshake has the potential to transmit infectious organisms between people, and that that transfer is dramatically reduced when using an alternative greeting such as a high-five or a fist bump.

“Adoption of the fist bump as a greeting could substantially reduce the transmission of infectious disease between individuals,” researchers write in the American Journal of Infection Control.

Through a series of tests it was found that fist bumps are 20 times more hygienic than handshakes. They are also 10 times cleaner than high-fives.

“For the sake of improving public health we encourage further adoption of the fist bump as a simple, free and more hygienic alternative to the handshake,” researchers concluded.

You can read more details about the experiment in the American Journal of Infection Control.