[Paediatric features of Dengue and Chikungunya fevers].

Dengue (Df) and Chikungunya fever (Cf) arbovirosis are booming in the world, because of the plasticity of their pathogens, mutant RNA viruses making the acquisition of sustainable herd immunity and vaccination difficult in humans, and the plasticity of their vectors, the female mosquitoes of the genus Aedes (Stegomya), capable of adapting to different environments. This review summarizes the viral life cycle and epidemiology of these arboviruses, pathogenesis and pediatric aspects of their clinical forms and the basic principles of their treatment and prevention.