D tarrayt i nessemres iwakken ad d-nsefhem wa ad nessisen inefkan i nexdem deg tfelwiyin deg uḥric n ufraz, yettili-d s iɛemden deg-s ad d-nesken uṭṭun, aswir, tawsitatg n tɣawsa i nezrew neɣ tin ɣef wacu nexdem anadi-nneɣ, TOURE.M.16 yiwi-d fell-as, yenna-d nessexdam-it iwakken ad nessisen talɣa-is yettwaseres di teṣleḍt n yinefkan ismektanen d yiɣaranen deg tfelwit i deg nettaf tigejda d tid ad d-yesbegnen infekan i d-yewwi umnadi.