The classic way rabies spreads is through a bite from an infected animal. The virus hangs out in the saliva, just waiting for a chance to jump ship into a new host. It’s like a tiny, microscopic pirate boarding your ship through a fresh, open wound.
But why the mouth? Because that’s the only place the virus can multiply and then escape into the world. Your dog’s cute, slobbery lick? Generally safe. A deep bite from a raccoon that draws blood? Different story.