ABSTRACT: Dengue is one of the most rapidly spreading mosquito-borne viral disease in the world [1]. Annually, about 50 million dengue infections occur, travelers from non-endemic countries to endemic dengue areas are at risk [2], most infections are asymptomatic, the hemorrhagic complication of the disease mainly affect children under 15 years of age [3]. Here is a case report of a 3 year old child with hepatitis A virus and dengue co infection. he had partial recovery of hepatitis A infection but with subsequent dengue virus co infection ,child developed complications like acutefulminant hepatic failure and death. The risk of DENV co-infection should be considered as cause of acute fulminant hepatic failure in pre- existing Hepatitis A infection