 Banki yisi iravuga uko ubukungu bwAfurika yo munsi ya Sahara buzahungabana Isi yugarijwe nihungabana ryubukungu rya mbere ribi guhera mu myaka ya 1930 Igice cya miliyari yabantu kizagwa mu bukene kubera iyi virus Ubu, nibwo bwa mbere ubukungu bwUbushinwa bushonze mu mezi atatu ya mbere yumwaka kuva bwatangira kubarura imibare ya buri gihembwe mu 1992. 