Ariko rero abigisha bo kuri kaminuza ya 'London School of Hygiene and Tropical Medicine mu Bwongereza, bakoze ikimeze nko gushiraho amakori ku bifungurwa vy'utuntu duto duto two gupfuvya inzara (snacks) nk'ibisuguti, gato n'imbombo, basanga vyoshobora gufasha.
