CXCL10 and infection: IP-10, or interferon-γ inducible protein (also known as CXCL10), is not only a more stable and easily measured marker for IFN-γ activity, but has also been strongly correlated with acute disease activity in Mycobacterium tuberculosis, hepatitis C virus, herpes simplex virus, and other pathogenic infections that elicit a strong Th1 response.24