IL6 and swine influenza: The overproduction of IL-6 is an important risk factor for worse outcomes in H1N1 influenza,155 SARS,156 MERS,157 and SARS-CoV-2.158, 159 Tocilizumab-dependent neutralization of IL-6 as a SARS-CoV-2 therapeutic is not fully elucidated.