0 0 0 ) ▁ ▁As ▁a ▁result ▁of ▁the ▁M MR ▁v acc ine ▁controvers y , ▁v acc ination ▁rates ▁dropped ▁sharp ly ▁in ▁the ▁United ▁Kingdom ▁after ▁ 1 9 9 6 . ▁From ▁late ▁ 1 9 9 9 ▁until ▁the ▁summer ▁of ▁ 2 0 0 0 , ▁there ▁was ▁a ▁meas les ▁out break ▁in ▁North ▁Dublin , ▁Ireland . ▁At ▁the ▁time , ▁the ▁national ▁imm un ization ▁level ▁had ▁fallen ▁below ▁ 8 0 %, ▁and ▁in ▁parts ▁of ▁North ▁Dublin ▁the ▁level ▁was ▁around ▁ 6 0 %. ▁There ▁were ▁more ▁than ▁ 1 0 0 ▁hospital ▁adm issions ▁from ▁over ▁ 3 0 0 ▁cases . ▁Three ▁children ▁died ▁and ▁several ▁more ▁were ▁grav ely ▁ill , ▁some ▁requiring ▁mechanical ▁vent ilation ▁to ▁recover . ▁ ▁Niger ia , ▁pol io , ▁meas les , ▁di ph ther ia ▁( 2 0 0 1 – ) ▁ ▁In ▁the ▁early ▁first ▁de cade ▁of ▁the ▁ 2 1 st ▁century , ▁conserv ative ▁religious ▁leaders ▁in ▁northern ▁Niger ia , ▁susp icious ▁of ▁Western ▁medicine , ▁ad vised ▁their ▁follow ers ▁not ▁to ▁have ▁their ▁children ▁v acc in ated ▁with ▁or al ▁pol io ▁v acc ine . ▁The ▁boy c ott ▁was ▁end ors ed ▁by ▁the ▁governor ▁of ▁K ano ▁State , ▁and ▁imm un ization ▁was ▁susp ended ▁for ▁several ▁months . ▁Sub sequently , ▁pol io ▁re app eared ▁in ▁a ▁dozen ▁formerly ▁pol io - free ▁neighb