▁die ▁each ▁year ▁from ▁can cers ▁prevent able ▁by ▁the ▁v acc ine . ▁ ▁V acc ine ▁schedule ▁Other ▁concerns ▁have ▁been ▁raised ▁about ▁the ▁v acc ine ▁schedule ▁recommended ▁by ▁the ▁Ad vis ory ▁Committee ▁on ▁Im mun ization ▁Pract ices ▁( AC IP ). ▁The ▁imm un ization ▁schedule ▁is ▁designed ▁to ▁protect ▁children ▁against ▁prevent able ▁dise ases ▁when ▁they ▁are ▁most ▁vulner able . ▁The ▁practice ▁of ▁delay ing ▁or ▁spacing ▁out ▁these ▁v acc in ations ▁increases ▁the ▁amount ▁of ▁time ▁the ▁child ▁is ▁sus cept ible ▁to ▁these ▁ill ness es . ▁Rece iving ▁v acc ines ▁on ▁the ▁recommended ▁AC IP ▁schedule ▁is ▁not ▁linked ▁to ▁aut ism ▁or ▁development al ▁delay . ▁ ▁Events ▁following ▁redu ctions ▁in ▁v acc ination ▁ ▁In ▁several ▁countries , ▁redu ctions ▁in ▁the ▁use ▁of ▁some ▁v acc ines ▁were ▁followed ▁by ▁increases ▁in ▁the ▁dise ases ' ▁mor bid ity ▁and ▁mort ality . ▁According ▁to ▁the ▁Cent ers ▁for ▁D ise ase ▁Control ▁and ▁Pre vention , ▁continued ▁high ▁levels ▁of ▁v acc ine ▁coverage ▁are ▁necessary ▁to ▁prevent ▁res urg ence ▁of ▁dise ases ▁that ▁have ▁been ▁nearly ▁elimin ated . ▁P ert uss is ▁remains ▁a ▁major ▁health ▁problem ▁in ▁developing ▁countries , ▁where ▁mass ▁v acc ination ▁is ▁not ▁pract iced ; ▁the ▁World ▁Health ▁Organ ization ▁estimates ▁it ▁caused ▁ 2 9 4 , 0 0 0 ▁death s ▁in ▁ 2 0 0 2 . ▁V acc ine ▁hes it