According to the key role of IL-6 in CSS, several mAb drugs have been considered for the treatment of severe COVID-19, including sarilumab (Kevzara), tocilizumab (Actemra) and levilimab, which target IL-6R, as well as clazakizumab, siltuximab and olokizumab, which target IL-6 [19, 20, 117, 118]. The gene discussed is IL6; the disease is COVID-19.