I'm going to stop hanging out with my friend because she's openly anti-vax
Why do you feel this way? Is it really worth it to lose her as a friend?
Yes, she is just a bad person and we're better off not being friends.
While it isn't particularly good to be against vaccinations, you shouldn't give up on a friendship so easily. Have you tried speaking with her about it at all? Losing one friend because of differences could lead to losing many, and maybe you are the only friend that she has left so you need to think about these things before you completely cut her out of your life.
It's not worth it, I've already cut her out.
Not everyone agrees on things like vaccinations, but it doesn't make her a bad person if she is against them. Her reasons might go deeper, so try with all your might to think how she feels inside instead of making her seem like a devil.