Iziphumo eziphambili
(1) Ukusetyenziswa kwendlela ye-gastrointestinal njengelungu lokudalwa kwendalo kunxulunyaniswa nemingcipheko yempilo yesifo esosulelayo nesosizi.
(2) phakathi kwabantu abakhokelela kwindlela yokuphila yobungqingili, bobabini abesilisa nabasetyhini, kukho amaxesha amaninzi umngcipheko wokwanda kwezifo ezahlukeneyo, zombini usulelo (i-HIV, isifo sengqondo, intsholongwane njl. Njl.), Unyango noqhaqho.