Keep in mind that the sample is tiny, the dose rate falls off as the distance squared, and only a small fraction of your body can be exposed to what ever the tiny Geiger counter right next to the sample tells you.

As far as bacteria etc goes they are far hardier when it comes to radiation, and to kill them takes billions times more radiation than your sample emits in an hour.

Once there’s symptoms. There was some research finding antibodies to rabies in people who never had the vaccine, but then again it could have been some related virus.

Source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7017994/