Upon SARS-CoV-2 infection, Slamf9+ macrophages, S100a9+ macrophages, Cd38+ macrophages, Cd38+ cDC2, and ciliated cells showed higher correlation with Cd160+Cd8+ T cells, while club cells, lymphatic endothelial cells (LECs) and vein endothelial cells (VECs) did not show higher positive correlation with Cd160+Cd8+ T cells after infection (Supplementary Fig. S5a). Here, SLAMF9 is linked to infection.