IL10 and COVID-19: Neutrophil-to-lymphocyte ratio, lactate dehydrogenase (LDH), D-dimer, C-reactive protein, creatinine, hemoglobin, aspartate aminotransferase (ALT), alanine aminotransferase (AST), ferritin, IL-6 and IL-10 among other parameters, indicate the severity of COVID-19 (4–6).