IL17A and asthma: Interestingly, higher levels of NETs positively correlated with asthma severity and IL-17 levels.[34–36] IL-17A levels are increased not only in severe asthma, but also in other inflammatory diseases with neutrophil recruitment.[37,38] In our previous review, we proposed that NETs are potential therapeutic targets for severe asthma.[39] However, the mechanism underlying the involvement of NETs in neutrophil-predominant severe asthma remains to be explored.