IL6 and COVID-19: The clinical manifestations of COVID-19 can range from asymptomatic to life-threatening respiratory failure.1 In severe or critical cases, increased levels of pro-inflammatory cytokines such as IL-6 and increased inflammation have been shown.2 Corticosteroids and immunomodulatory drugs are recommended and frequently used because they reduce mortality.3-5 Also, immunodeficiency is seen in severe COVID-19 cases.