So there are lots of opportunities for spreading bacteria between people - particularly if they are carrying potentially infectious bacteria that could make us ill. This includes faecal bacteria, which is quite common on hands - which is why good hand hygiene is essential.
Alternative handshakes - fist pumps, high fives. The amount of bacteria transferred through a handshake is twice as much compared with a high five. Significantly lower numbers of bacteria are also transferred when a fist pump is used.
So, is the traditional handshake being replaced with healthier options? This will take time - if it happens at all. But as awareness of infectious diseases grows and people actively try to reduce the spread of infection, perhaps there could be a future where we all high five and fist pump rather than formally shake hands. Or at the very least better adoption of handwashing.