I mean, really, how many times are we exposed daily to "dangerous germs" only not to contract anything? Unless you have an immune system disorder, you'll be fine.
I do absolutely nothing other than maybe wash my hands. I am not afraid to touch anything within reason. I perhaps contract the flu every couple of years. Pretty amazing with kids in daycare/preschool. This again, could be due to regular exposure to the stuff.
The kids taught me that our human bodies are quite robust from illness...

Otherwise, nobody would even last a year on this planet.