CXCL10 and dengue disease: There was significantly more IP-10 in the serum of the patients during the first (1–2 days after fever onset) and second (4–5 days after fever onset) visits, compared to the convalescent serum (P = 10−15 and P = 10−11, respectively) as well as to non-dengue fever patient serum (P = 10−9 and P = 10−7, respectively).