IL33 and infection: One study observed Trichinella spiralis (Ts) infection was able to increase IL‐13 production by ILC2s in the lung, resulting in increased parasite trapping as the new boren larvae move through the circulation to the muscles [7], although whether the IL‐13 production by ILC2s is driven by IL‐25 or another alarmin was not determined, and IL‐33 has been observed to act redundantly with IL‐25 in the lung to support ILC2 responses [45].