▁to ▁deal ▁with ▁small po x ▁out break s ▁and ▁was ▁listed ▁as ▁one ▁of ▁the ▁" important ▁events ▁in ▁the ▁history ▁of ▁small po x ▁control " ▁by ▁those ▁most ▁involved ▁in ▁the ▁World ▁Health ▁Organ ization ' s ▁successful ▁Small po x ▁Er adic ation ▁Camp aign . ▁The ▁final ▁stages ▁of ▁the ▁campaign , ▁generally ▁referred ▁to ▁as ▁" sur ve ill ance ▁contain ment ", ▁ow ed ▁much ▁to ▁the ▁Le ic ester ▁method . ▁ ▁United ▁States ▁In ▁the ▁US , ▁President ▁Thomas ▁Jefferson ▁took ▁a ▁close ▁interest ▁in ▁v acc ination , ▁alongside ▁Dr . ▁Water house , ▁chief ▁phys ician ▁at ▁Boston . ▁Jefferson ▁encourag ed ▁the ▁development ▁of ▁ways ▁to ▁transport ▁v acc ine ▁material ▁through ▁the ▁Southern ▁states , ▁which ▁included ▁measures ▁to ▁avoid ▁damage ▁by ▁heat , ▁a ▁leading ▁cause ▁of ▁in effect ive ▁batch es . ▁Small po x ▁out break s ▁were ▁contained ▁by ▁the ▁latter ▁half ▁of ▁the ▁ 1 9 th ▁century , ▁a ▁development ▁widely ▁attributed ▁to ▁the ▁v acc ination ▁of ▁a ▁large ▁portion ▁of ▁the ▁population . ▁V acc ination ▁rates ▁fell ▁after ▁this ▁decl ine ▁in ▁small po x ▁cases , ▁and ▁the ▁disease ▁again ▁became ▁ep ide mic ▁in ▁the ▁late ▁ 1 9 th ▁century . ▁ ▁After ▁an ▁ 1 8 7 9 ▁visit ▁to ▁New ▁York ▁by ▁prominent ▁British ▁anti - v acc ination ist ▁William ▁T ebb , ▁The ▁Anti - V acc ination ▁Society ▁of ▁America ▁was ▁founded .