Twasanze abagore bafite umubyibuho ukabije baba bafite amahirwe 50% yo kongera kuyirwara, abagore banywa inzoga byibura icupa rimwe ku munsi baba bafite amahirwe 90% naho abagore banywa itabi baba bafite amahirwe angana na 120% yo kongera kurwara kanseri y’ibere.