Banki y'isi iravuga uko ubukungu bw’Afurika yo munsi ya Sahara buzahungabana ‘Isi yugarijwe n’ihungabana ry’ubukungu rya mbere ribi guhera mu myaka ya 1930’ Igice cya miliyari y’abantu kizagwa mu bukene kubera iyi virus Ubu, nibwo bwa mbere ubukungu bw'Ubushinwa bushonze mu mezi atatu ya mbere y'umwaka kuva bwatangira kubarura imibare ya buri gihembwe mu 1992.
