CXCR3 and infection: Finally, CXCR3+ cells are overall increased in the lung of Rhesus macaques following infection with SARS-CoV-2 (37), and CXCL10 levels were increased in in vitro influenza virus-infected human macrophages (38), in human lung tissue explants infected with SARS-CoV-2 (26), and in the lungs of mice infected with influenza virus (4, 39, 40).