In addition to reducing the number of pro-inflammatory cytokines, IL-10 may also play a role in regulating the recruitment of neutrophils and the spread of bacteria from the lungs to other tissues (36).Our previous research found that an abnormal increase in IL-10 in the secondary hemophagocytic syndrome of the cytokine storm could predict the patient’s death (37). This evidence concerns the gene IL10 and hemophagocytic syndrome.