ak ia ▁did ▁not ▁agree ▁that ▁the ▁M MR ▁v acc ine ▁was ▁safe . ▁ ▁Most ▁of ▁the ▁GP s ▁did ▁not ▁recommend ▁the ▁season al ▁influen za ▁v acc ine . ▁ ▁Conf idence ▁in ▁the ▁population ▁correl ated ▁with ▁confidence ▁among ▁GP s . ▁One ▁study ▁in ▁the ▁United ▁States ▁found ▁that ▁after ▁v acc ine - hes it ant ▁college ▁students ▁interview ed ▁surv iv ors ▁of ▁v acc ine - prevent able ▁dise ases , ▁they ▁were ▁more ▁likely ▁to ▁become ▁pro - v acc ine ▁than ▁a ▁control ▁group . ▁ ▁Part ies ▁opposed ▁to ▁the ▁use ▁of ▁v acc ines ▁frequently ▁refer ▁to ▁data ▁obtained ▁from ▁the ▁US ▁V acc ine ▁Ad verse ▁Event ▁Report ing ▁System ▁( VA ERS ). ▁This ▁is ▁a ▁database ▁of ▁reports ▁of ▁issues ▁associated ▁with ▁v acc ines . ▁When ▁used ▁appropri ately ▁V A ERS ▁is ▁a ▁useful ▁tool ▁for ▁investigation , ▁but ▁since ▁anyone ▁can ▁make ▁a ▁claim ▁and ▁have ▁it ▁entered ▁into ▁the ▁V A ERS , ▁by ▁itself ▁it ▁is ▁not ▁a ▁reliable ▁source ▁of ▁information . ▁Dub ious ▁claims ▁about ▁v acc ines ▁against ▁he pat itis ▁B , ▁H P V ▁and ▁other ▁dise ases ▁have ▁been ▁propag ated ▁based ▁on ▁mis use ▁of ▁data ▁from ▁V A ERS . ▁ ▁See ▁also ▁▁▁ ▁Chem oph ob ia ▁ ▁Me as les ▁res urg ence ▁in ▁the ▁United ▁States ▁ ▁V acc ine ▁shed ding ▁ ▁References ▁ ▁Further ▁reading ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ ▁▁▁▁▁ ▁Lew