How the Rabies Virus Causes Aggression

Stephen King: I really wanted to know how the rabies virus could cause this. Like, how does it end up causing this intense amount of aggression? And I actually didn't get quite as great of an answer as I was hoping for. What it seems happens is that your neurons kind of just get very, very full of virus. That's why you get that crazy, excessive salivation and this foaming at the mouth.