UKUXELWA KWAMAHHALA KUZO ZONKE IZIMPAWU ZE-BUSHNELL
Iimveliso ezinceda iimfuno zempilo zabemi. Ngokwe-WHO, ezi mveliso kufuneka zibekho "ngamaxesha onke, kwixabiso elifanelekileyo, kwiifomu zedosi efanelekileyo, kunye nomgangatho oqinisekileyo kunye nolwazi olwaneleyo, ngexabiso umntu kunye noluntu abanakho ukulifumana".