▁of ▁D imes . ▁First ▁rec ru ited ▁to ▁the ▁pol io ▁initi ative ▁were ▁Cl enn el ▁van ▁Ro o yen ▁and ▁Andrew ▁J . ▁Rh odes . ▁Following ▁an ▁especially ▁severe ▁ep ide mic ▁that ▁struck ▁the ▁In uit ▁community ▁of ▁ig l ul ig aar j uk ▁in ▁the ▁North west ▁Territ ories , ▁the ▁L abs ' ▁Ar ctic ▁investig ations ▁revealed ▁that ▁the ▁pol io ▁had ▁very ▁little ▁to ▁do ▁with ▁ge ography ▁or ▁a ▁summer ▁" pol io ▁season ", ▁factors ▁that ▁had ▁been ▁thought ▁to ▁affect ▁trans miss ibility ▁of ▁the ▁disease . ▁ ▁In ▁ 1 9 4 9 , ▁research ers ▁at ▁Con n aught ▁discovered ▁a ▁purely ▁synth etic ▁bl end ▁of ▁ 6 0 ▁ing red ients ▁that ▁efficiently ▁fed ▁the ▁cells ▁required ▁to ▁cultiv ate ▁vir uses . ▁They ▁named ▁it ▁" Med ium ▁ 1 9 9 ", ▁having ▁hit ▁upon ▁the ▁mix ▁after ▁ 1 9 8 ▁attempts ▁and ▁more ▁than ▁two ▁years ▁or ▁experiment ation . ▁In ▁November ▁ 1 9 5 1 , ▁the ▁Med ium ▁ 1 9 9 ▁team ▁supplied ▁the ▁pol i ov irus ▁research ▁team ▁with ▁a ▁sample ▁that ▁effectively ▁resolved ▁the ▁road block s ▁that ▁pol i ov irus ▁research ▁had ▁run ▁into ▁in ▁cultiv ating ▁the ▁pol i ov irus . ▁News ▁of ▁the ▁success ▁reached ▁Jon as ▁S alk ▁in ▁Pitts burgh , ▁who ▁upon ▁receiving ▁the ▁supply ▁of ▁Med ium ▁ 1 9 9 ▁was ▁able ▁to ▁prepare ▁a