Izi ndi mankhwala ophera tizilombo toyambitsa matenda omwe amagwiritsidwa ntchito popanga machubu osataya mpweya.Amapangidwa kuti azigwiritsidwa ntchito pazachipatala ndi zipatala.Mankhwala ophera tizilombo amatha kuthana ndi tizilombo tambirimbiri, kuphatikiza mabakiteriya, ma virus, ndi mafangasi.Ndi yosavuta kugwiritsa ntchito ndipo amapereka mlingo wapamwamba wa chitetezo ku matenda.Mankhwala ophera tizilombo ndi otetezeka komanso opanda poizoni, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito pazachipatala.