A binary logistic regression analysis model showed that pneumonia caused by COVID-19 was associated with levels of IL-6 > 16 pg/ml (OR = 4.02; p < 0.01; 95% CI = 1.43–11.34) and IL-10 > 3 pg/ml (OR = 9.36; p < 0.01; 95% CI = 3.21–21.44). This evidence concerns the gene IL6 and susceptibility to pneumonia measurement.