Typically in asthma, cytokines released by Type 2 T helper (Th2) cells including interleukin-4 (IL-4), interleukin-5 (IL-5), and interleukin-13 (IL-13) as well as cytokines released by Type 1 T helper (Th1) cells such as interferon-gamma are considered to be the main cytokines triggered in asthma (Ngoc et al., 2005). Here, IL4 is linked to asthma.