(NBC News) - Our society dictates that when meeting someone new, the polite thing to do is shake their hand.
Now new research suggests the common handshake is great if you want to make someone sick. Infectious disease experts have a better and safer solution.
"Rather than replace the handshake with something else that has contact, probably the better approach to keep patients safe is really not to do it at all," said Dr. Mary Lou Manning from Association for Professionals in Infection Control and Epidemiology.
The study said the handshake transmits double the amount of bacteria than a high five, and the fist bump transmits even fewer.
Hands are the perfect transmitters because people touch everything with them, according to experts.
Doctors said most bacteria on our hands is perfectly safe, but there is always the chance of something more dangerous sticking around unseen.