Association between Guillain-Barré syndrome and SARS-CoV-2 virus infection, including the impact of COVID-19 vaccination in the context of the development and general clinical characteristics of the disease

During the COVID-19 pandemic, a statistically significant increase in the incidence of Guillain-Barr & eacute; syndrome (GBS) has begun to be observed. This article discusses the impact of immunological processes on structural and functional changes in the peripheral nervous system on the pathogenesis of GBS. The aim of the systematic review is to analyze and discuss available information from the scientific literature regarding a possible clinical relationship between SARS-CoV-2 infection along with vaccination mainly, adenovector and mRNA vaccines and the development of different types of Guillain-Barr & eacute; syndrome. The review specifically discusses the role of proinflammatory cytokines and "cytokine storm" in patients with COVID-19 and their potential impact on the phenomenon of "molecular mimicry" and the generation of autoantibodies in GBS. This issue has been expanded to include information from studies on the impact of vaccination against SARS-CoV-2 virus and the higher number of observed cases of Guillain-Barr & eacute; syndrome. Focusing on the characteristics of the methods, materials, results and conclusions, the review finally included 114 publications, like studies, meta-analyses, clinical cases and reviews. The systematic review was conducted using PubMed, Google Scholar, and Elsevier databases. It pointed out the molecular and clinical association between SARS-CoV-2 virus infections and COVID-19 vaccination, in the development of Guillain-Barr & eacute; syndrome in the context of its clinical course.