IL-17A–producing γδ T cells within the lung consist mostly of Vγ4+ and Vγ6+ cells that can function as either protective or pathogenic cells during infection, inflammation, and allergy (Faustino et al., 2020; Guo et al., 2018; Misiak et al., 2017; Wang et al., 2021). This evidence concerns the gene IL17A and infection.