CD40LG and dengue disease: We defined a case of dengue as a fever of 2-7 days duration in a resident of East Delhi area from May 14 to December 18, 2015, with at least two symptoms (headache, retro-orbital pain, myalgia, arthralgia, rash, or hemorrhagic manifestations) and positive lab test by IgM MAC ELISA or NS1 antigen test.