Have you added any new soils or plants or rocks or fish? That is how white spot disease spreads. It is highly contagious so I highly recommended to get medicine as fast as you can. If left too long, it will spread and may possibly kill your goldfish. Turning up the temperature will help.
Your country actually helps a lot. USA is known to almost fully eradicate rabies in urban and suburban regions, while it still exists in wild. Apparently, there are 1-3 cases a month in the whole country per year.
Another thing that makes you safe is that it wasn't a deep wound, it was a scratching, most of which is absorbed by your jeans.
The normal ...