Seeing a lot of mentions of Pit Bulls, it could be any dog. I've had a husky try to bite me and my pits never have.
Chihuahuas are actually more agressive: https://www.panterlaw.com/2016/10/26/study-finds-pit-bulls-less-aggressive-chihuahuas/
Maybe, it depends where you are going? I can't imagine a rabid dog coming at me! I guess I have mine updated on shots but not everyone does and they can't prevent everything I suppose. I know Cujo would have gone a lot differently had they had a gun.