Izingane eziya enkulisa ye-kindergartens zingenasengozini yokuhlupheka ngenxa yomdlavuza wegazi, ososayensi
Ososayensi abavela eNyuvesi yaseCalifornia baphetha ngokuthi amathuba okuthiwa i-leukemia anciphise ezimweni ezinjalo cishe cishe 1/3, ehlola izingane ezingu-20,000. Ukungavikeleki emdlalweni wegazi kungase kuthuthuke ngenxa yezifo eziningana izingane ezithathelwana ngazo njalo ezinkulisa. Futhi kungenzeka ukuthi esikhathini esizayo umntwana uzobe esengozini kakhulu uma esemncane ukuzivikela kwengane kuvela ngaphansi kwezimo ze-hothouse. Ngokwezibalo, ingane eyodwa yabangu-20 000 ihlushwa i-leukemia, uhlobo oluvame kakhulu lomdlavuza wezingane emazweni asezimboni.