The White House/Wikimedia Commons
Guest post by Chris Riotta
Fist bumping spreads far fewer bacteria than a handshake or a high five.
A handshake transfers twice as many bacteria as a high five and roughly twenty times more bacteria than a fist bump, researchers report July 28 in American Journal of Infection Control. The results support some doctors' decisions to ban handshakes in hospitals and healthcare facilities as a way to decrease the spread of infectious diseases.