CCR1 and infection: On the one hand, these recruited Neu, Mono/Macro cells not only may inhibit the SARS-CoV-2 virus and clear damaged cells, but also may further recruit T cells to the infection site to increase the inhibition of SARS-CoV-2 through certain ligand and receptor pairs (e.g., ALOX5_ALOX5AP, C5AR1_RPS19, CCL5_CCR1) (Figs. 3 and 6H) [19–21, 43, 44].