It’s official, the fist-bump is more hygienic than the traditional hand-shake. Not terribly surprising; this seems to be the official greeting of everybody in food-service for obvious reasons. The only unfortunate side effect here is bros are apparently healthier than people who behave like professionals.
The pair tested three different greetings and assessed the amount of germs transferred from each contact. They found that a high dose of bugs were passed on during a handshake. This was reduced by over half in the high-five, and germ transfer was a whopping 90% lower when bumping fists. The fist-bumping researchers also looked at grip strength and found that a stronger handshake increased the amount of bacteria shared.[*]