IL6 and COVID-19: From a clinical point of view, we have shown that viremia has a high consistence as a severity biomarker in COVID-19, since it correlates with several variables that have been proposed to be associated with poor evolution in COVID-19, namely old age, comorbidity, qSOFA and CURB-65, as well as with laboratory markers such as high IL-6 or LDH serum levels and severe lymphopenia.