Furthermore, in a model of OVA-allergic mice infected with RSV, neutralization of IL-33 significantly reduced ILC2, eosinophils, and the prototypical allergic proteins IL-5, IL-13, CCL17 and CCL22, further indicating the key role played by IL-33 in RSV-induced asthma exacerbation (148). Here, IL33 is linked to asthma.