Although classification accuracies were comparable between the two models, both the residual deviance (the lack of fit to the perfect model) and the Akaike information criterion (AIC; a measure of prediction error) were smaller for this model, indicating that the CCL20/IL6/IL10/hsa-miR-451a model fitted the data better and suggesting a potential role for these CC and miRNA in fatal COVID-19. Here, IL6 is linked to COVID-19.