“…2 Most reported adverse effects following COVID-19 vaccination have been systemic, local, or allergic reactions. 1 Although rare, there is still concern over neurological vaccine-related side effects 10 ; however, only two patients to date have reportedly developed NA involving the brachial plexus after receiving the BNT-162b2 (Pfizer, New York, NY, USA) vaccination antigen. 6,9 The vaccination is suspected to elicit an immune-mediated inflammatory response to the injected antigen, 6,9 and this vaccine-triggered immune reaction may result in an NA attack involving the lumbosacral plexus.…”