IL6 and viral infectious disease: Due to sequence homology with SARS-CoV, SARS-CoV-2 might simulate the behavior of SARS and MERS and induce neurodegeneration in the respiratory center in the medulla via enhancing the release of multiple inflammatory cytokines IL-1, IL-6, and TNF-α (Montalvan et al. 2020), regarding that IL-6 is strongly associated with the severity of viral infection (Wan et al. 2020).