We all know the 5 second rule.  Drop something on the floor and if you pick it up in 5 seconds you are OK.

Obviously not a scientific rule but those that grew up following that rule have immune systems that little kids could only dream of.

But this picture about a girl falling asleep on a filthy public subway and losing her Pizza….  well that does stretch the theory…. but Pizza…. anhnaghhhhh

There is paper underneath it so I think it would be OK .  Maybe a 5 minute rule.