People once believed that when you sneezed, your soul left your body, and so they would say “bless you” to prevent the devil from snatching your soul. Now, people don’t tend to worry about that as much, instead they worry about getting infected by invisible creatures floating in the sneeze droplets. Today we’re going to talk about viruses, those nasty microscopic opportunistic unemployed robots all around you, and why they make you sneeze.