SUDV is believed to have broken out first amongst cotton factory workers in Nzara, Sudan (now in South Sudan), in June 1976, with the first case reported as a worker exposed to a potential natural reservoir.
O SUDV crese que empezou en traballadores dunha fábrica de algodón en Nzara, Sudán (hoxe en Sudán do Sur), e o primeiro caso foi o dun traballador exposto a un reservorio natural potencial.