<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?kiwango wa watoto wa chini ya miaka mitano wanaougua homa ya ini aina b kilishuka mwaka 2019 hadi chini ya asilimia 1 kutoka asilimia 5 katika miaka 1980 na mwanzoni mwa miaka ya 2000 kwa mujibu wa shirika la afya duniani  <response>: the prevalence of hepatitis b in children below five years of age across the globe declined to under 1 in 2019, coming down from 5 between the 1980s and early 2000s, reported the world health organization who. 