CCR1 is an inflammatory chemokine receptor that is expressed by immune cells, and has been shown to be important in a number of pathologies, including sepsis, viral infections, cancer and autoimmune disease (Domachowske et al., 2000; Katschke et al., 2001; Ness et al., 2004; Kitamura et al., 2015). Here, CCR1 is linked to viral infectious disease.