Furthermore, significantly higher frequencies of Th17 cells, which induce neutrophil infiltration into sites of inflammation via the production of IL-17 (Way et al., 2013), and higher levels of IL-17A have been observed in patients with refractory mycoplasma pneumonia (Wang et al., 2016; Zhao et al., 2020). The gene discussed is IL17A; the disease is Mycoplasma pneumoniae pneumonia.