CXCL10 and severe acute respiratory syndrome: IP‐10 promotes inflammation in Human Immunodeficiency Virus (Lei et al., 2019), H5 N1 Influenza A (Chan et al., 2005; Jong et al., 2006), Middle‐East Respiratory Syndrome virus (Chu et al., 2014) and SARS‐CoV (Chen & Subbarao, 2007) infections, thus its prominence early in SARS‐CoV‐2 infection, while unsurprising, may be important for understanding evolution of disease from initial mildly symptomatic to severe and sometimes fatal.