TNF and Guillain-Barre syndrome: Numerous cytokines (TNF-α, IL-1β, IL-6, IL-17, IFN-γ) are involved in the pathogenesis of GBS and are also involved in the development of COVID-19 disease (Fig. 3) (Bentley et al. 2022; Palaiodimou et al. 2021; Hussain et al. 2020).