Umwuka mwiza ni ngombwa mu mibereho myiza, ariko nk'uko Ishami ry'Umuryango w'Abibumbye ryita ku Buzima ryita ku Buzima (OMS) ribivuga, hafi 99% by'abatuye isi bahumeka umwuka urenze urugero rwabo rwo kwanduza ikirere. "Ubwiza bw'ikirere ni igipimo cyerekana uko ibintu biri mu kirere, birimo uduce na gaze p ...