UPSIDE? 99% effective It may be left in place for up to 5 years and removed at any time before that.
Ihe dị mkpa: Ihe ngosi pasent nwere ike ịkwụsịtụ na 99% maka ntakịrị oge karịa nke ọ nwere ike ịnwe na nhọta ọ bụla ọzọ na-egosi tupu oge ahụ.