Fist bumps spread fewer germs than handshakes and even high-fives.
That's what researchers in Wales say.
Researcher David Whitworth says fist bumps spread only one-twentieth the amount of bacteria that handshakes do.
And, he says high-fives pass along about half the germs handshakes do.
The results of his study are online in Monday's American Journal of Infection Control.
Copyright 2015 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.