Since the introduction of Aedes albopictus into North and South America, 18 viruses in 3 families have been used in vector competence studies involving 10 North American and 4 South American geographic strains of Ae. albopictus. This review summarizes the results of these studies and discusses the potential of Ae. albopictus to become a vector of arboviruses of public health importance in areas of the Western Hemisphere where it has recently become established. [References: 27]