CXCL10 and COVID-19: CXCL10: CXCL10 is a frequently studied gene in multiple COVID-19 genetic studies (Bermejo-Martin et al., 2020; Chua et al., 2020; Hou et al., 2020; Parkinson et al., 2020; Xiong et al., 2020; Han et al., 2021; Tan et al., 2021).