IL13 and asthma: Another very recent study [62], enrolling 1016 infants <12 months in 17 U.S. centers, confirms that high levels of cytokines inducing a Th2 immune response (IL-4, IL-5, IL-13, and Thymic Stromal Linphopoyetin) are significantly related to the onset of asthma in infants up to four years of age.