Mu gihe wokingira gusa abasanzwe bageramiwe, uzohagarika impfu zahora zibahitana muri uwo mugwi, ugabanye umuzigo ku bitaro vyahora bibakira, ariko ntibizohagarika ukwanduzanya, nk'uko bivugwa n'uwahoze ashinzwe igisata co gucandaga mu Bwongereza, Prof David Salisbury.
