é syndrome have been reported following vaccination with the J&J single-dose vaccine. There have, however, been only around 100 cases reported out of close to 13 million people receiving the jab in the US. In SA's Sisonke trial, there was one reported case of the disorder among nearly 500 000 healthcare workers – and the patient recovered. The Covid-19 vaccine by Johnson & Johnson (J&J) has been linked to a small increased risk of Guillain-Barré syndrome, a rare but potentially serious neurological condition, federal officials in the US said on Monday. As a result, the US Food and Drug Administration (FDA) plans to add a warning about the syndrome to the J&J vaccine, as reported by