The ujeedooyin tijaabo on meerayaasha qaar ka mid ah soo abuurmo noocyada kala duwan ee miyir, badan oo ka mid ah oo laga yaabo shisheeye midba midka kale. sida caadiga ah, tani waa sabab u ah heerarka hooseeya ee noocyada dagaallamaya, waa shay caadi ah in kooxaha kala duwan ee microbes. Haddii kasta oo iyaga ka mid ah si uu u qabto dul “carshiga boqorka ee” – hana ka baqan Akhri wax dheeraad ah