I'm going to cut off my brother for publicizing that I haven't had a vaccine
Why do you want to cut off your brother over a measly thing as telling people about your lack of a vaccine?
He made me really mad about it, it is effecting how other people see me.
Reporting to people about someone's vaccine that hasn't been taken is wrong if you don't have permission to do it. Cutting someone off because of it is really petty, no matter what he made public.
Fuck I should probably take a vaccine because I really don't want to live.
It is wrong what he did to you but I think you should talk to him and tell him how you feel. If you no longer want to live I think you should seek a therapist to try and get the help you need.