system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: when we walk or press surfaces hard are we killing viruses and bacteria like some unseeing giants of a microverse or are they too small for us to physically affect?
gpt
Yes and No.  Bacteria are small enough that the surface of the bottom of your shoe (and the surface you are walking on) are full of relative valleys and troughs - very much large enough in which to be kept away from the crushing forces.  

That said, it's certainly true that some are killed - e.g. that bacteria sitting on the peak of a spot on your shoe hitting the peak of the concrete will get crushed.  But...the million brother bacteria right next to it are left fine.

TL;DR: don't use a fly swatter to wash your hands clean of bacteria.