This document is a brief review of two arboviruses that are drawing global attention, on the one hand the Mayaro Virus, clearly American and widely known in South America, and the Usutu virus, of South African origin, but which is currently plaguing the Europe, with cases of a neuroinvasive form reminiscent of West Nile Virus, which could reach the Americas without being controlled, and probably following the path of dissemination of the Chikungunya and Zika viruses. Fortunately, its vectors are distinct from Aedes (culex for Usutu and Haemagogus for Mayaro), which may explain its current lack of dissemination, but that of using the Aedes genus, dissemination could be greater and global.