IL6 and acute respiratory distress syndrome: In reason of a disproportionate and aberrant immune response able to drive COVID-19 to the related ARDS and, in some patients, to fibrosis and widespread lung damage, tocilizumab, a humanized anti-interleukin-6-receptor (IL-6R) monoclonal antibody that inhibits interleukin-6 (IL-6) signaling, is currently under investigation in several clinical trials [9].