That makes me wonder if she got it from a flu shot. My mother got GBS in 1990. When did it happen to your cousin?
Honestly, I can’t remember exactly. Heard from my mother (cousin lives in another State) 10 or so years ago that she got it after having a flu shot. It almost completely paralyzed her for a while and slowly deminished but not completely. Still has problems using one arm and both hands.... No one in the family will have a flu shot now....