To ascertain if viral infection-induced CD47 expression is specific to certain cell types, we conducted co-immunostaining of airway epithelial cells and observed that CD47+ HNECs (Supplementary Fig. 2d) and CD47+ HBECs (Fig. 1e) were co-localized with the ciliated cell-specific marker, Ac-α-tubulin (92.0 ± 1.0% in HNECs; 91.1 ± 0.6% in HBECs) rather than the goblet cell-specific marker, MUC5AC (0.6 ± 0.6% in HNECs; 3.0 ± 1.6% in HBECs), during viral infection. Here, MUC5AC is linked to viral infectious disease.