What is GBS, the syndrome behind SA’s first Covid-19 vaccine-related death?

The South African patient got vaccinated against the coronavirus, choosing the Johnson & Johnson Covid-19 jab. But what happened soon after had everyone stumped and many health professionals floored. The patient developed Guillain Barré Syndrome (GBS), one of the possible side effects of the Janssen Covid-19 vaccine. A mere 100 000 people, globally, are affected by this disease a year – and few of them die from it. What is even more puzzling about this SA patient, whose details were withheld, is that they seemed relatively healthy and had no other diseases which could have led to their sudden death.