I work in healthcare and I agree with you . . . and I’m also autistic, so I can see exactly how this happened.
Here in the States, I often bemoan the litigious society where everyone sues everybody because they can . . . but a “benefit” (or maybe a left-handed gift?) of this feeding frenzy by lawyers is that hospitals look for everything because they’re paranoid about lawsuits.
This paranoia would have found his Guillian-Barre Syndrome.