CD8A and asthma: Respiratory viral infections can induce high levels of TSLP production in airway epithelial cells, which not only promotes the recruitment and activation of inflammatory cells, leading to the onset of asthma, but may also exacerbate the acute exacerbation of asthma by affecting the secondary response of memory CD8+ T cells (O’Sullivan et al., 2001; Gilliet et al., 2003; Yadava et al., 2013).