Any research on why some people get guillain-barre syndrome , when most don't? does gbs tend to occur more in families with migraines/epilepsy?

Guillain-Barré : (gbs) is a rare disorder in which one's immune system damages their nerve cells, causing muscle weakness and sometimes paralysis. Gbs can cause symptoms that last for a few weeks. Most people recover fully from gbs, but some people have permanent nerve damage. In very rare cases, people have died of gbs, usually from difficulty breathing. Not migraines epilepsy, but a viral illness association.

Probably autoimmune: Preceding infection, such as flu, seems to trigger the event. The only variant with genetic predisposition is acute motor axonal neuropathy, in japan and china. Antibodies to gangliosides play a role. It is not more prevalent in families with migraines or epilepsy.