IL2RG and asthma: Because signalling by IL-15 occurs via the IL-2/IL-15 receptor β-chain (CD122) and common γ chain receptor (CD132) expressed primarily by NK and memory CD8 T cells [7], [8], [23], [26], it will be of great interest to determine the levels of these receptors on airway NK and CD8 T cells in virus-induced asthma.