Fang et al. [36] also determined that elevated interleukin-6 (IL-6) and procalcitonin, leukopenia, lymphopenia, eosinophilia, neutrophilia, thrombocytosis, increased D-dimer, activated partial thromboplastin time (aPTT), thrombin time, and prothrombin time were predictors of long COVID. This evidence concerns the gene IL6 and lymphopenia.