IL26 and bacterial infectious disease: The findings are compatible with the hypothesis that, during a bacterial infection in human lungs, local IL-26 increases the mobilization of leukocytes and neutrophils in the blood to enhance recruitment into the target organ, whereas under normal physiological conditions, local IL-26 curtails the mobilization of leukocytes and neutrophils in blood, to prevent any inherent recruitment and subsequent accumulation in the lungs.