IL6 and COVID-19: Notably, among the proinflammatory cytokines, IL6 is reported to potentially play an important role in the initiation of the cytokine storm; and the administration of tocilizumab, an anti-IL6 monoclonal antibody, resulted in the improvement of the outcomes of COVID-19 patients, with all patients discharged an average of 15.1 days after the administration of tocilizumab [44].