https://casereports.bmj.com/content/14/4/e242956Case report
Guillain-Barre syndrome following the first dose of the chimpanzee adenovirus-vectored COVID-19 vaccine, ChAdOx1
We present an interesting case of a 37-year-old man who, 3 weeks following his first dose of the chimpanzee adenovirus-vectored COVID-19 vaccine, ChAdOx1, presented to hospital with a rapidly progressive ascending muscle weakness and back pain in the absence of any other triggers.
PS I checked to see if the "chimpanzee" part of the vaccine was kosher and apparently it's a thing. (WIKI: ChAdOx1 has been derived from a simian adenovirus (ChAd) serotype Y25 engineered by λ red recombination to exchange the native E4 orf4, orf6 and orf6/7 genes for those from human adenovirus HAdV-C5)