IL4 and type 2 diabetes mellitus: A significantly higher level of IL-4 found on the first postinfection day, as well as higher levels of IL-4 and IL-10 detected on the third postinfection day in the T2DM group as compared to the control group, suggests that dengue patients with an underlying T2DM are at higher risk for development of DHF, which was consistent with the same conclusion drawn based on previous epidemiological observations [10–13].