Thanks for answer,i do have RA and some type of autoimmune disorder (still checking) im leaning towards lupus,im new here and thank you for the answer,sorry about mom,im trying to find out what caused AD if i can.:)
No, but check both scarlet fever and rheumatic fever on wiki. The immune response initiated by scarlet fever can lead to rheumatic fever. Said immune response destroyed my mother's heart valves because cartilage and the bacteria's cell wall are somewhat similar.