A recent study showed that the only biomarkers that could distinguish severe or moderate asthma from mild asthma are neutrophil count and IL-8, out of the eight potential biomarkers (IL-8, neutrophils, eosinophils, IL-1Rα, IL-1α, IL-5, IL-6, and RANTES) investigated in BALF (Sur et al., 2012). The gene discussed is CCL5; the disease is asthma.