CD8A and viral infectious disease: Furthermore, the association between CD8+ T cells and areas of dysplastic repair was seen only at post-acute timepoints and strengthened over time, recapitulating features of human lungs after severe SARS-CoV-2 infection and suggesting these immune-epithelial progenitor interactions are primarily a feature of chronic sequelae of viral infections (Fig. 3f, Extended data Fig. 6e–g).