Pfupisa nyaya yacho:  (CNN) Mumakore mashomanene apfuura, tave pedyo nokupedza chirwere cheporiyo munyika yose pasina kubudirira kwakakwana. Zvisinei, unyanzvi hutsva hwekurapa, chipfeko chinoiswa nyore nyore nemajekiseni maduku, chingava chinhu chinokosha chinogona kuita kuti izvi zviitike. Chinetso chikuru pakupedza chirwere cheporiyo chaisanganisira nzira dzokuendesa nadzo mushonga wacho kuvanhu vanouda, kunyanya munzvimbo dzakaoma dzinogara vanhu vane chisimba kana kuti vane urombo. Zvikamu zviduku zvetsono, izvo zvakafanana nebhandeji duku rinonamatira, zvingasvitsa mushonga wokudzivirira polio pamasuo evanhu vanouda. Nokuiisa paganda uye kuisundira pasi, mushonga wacho unobuda mumaminiti mashomanana. Panzvimbo pokuda varapi vakarovedzwa zvikuru, vashandi vakarovedzwa zvishomanene vaigona kuenda pasuo nesuo, nokukurumidza vachipa mushonga wacho. Pava nemakore 60 kubva pakatanga kubayiwa nhomba yakawanda yaJonas Salk nevana vechikoro muna April wa1955 iyo yakaita kuti zvirwere zveporiyo muUnited States zvidzikire neanenge 90 muzana mumakore maviri. Mushonga wacho wakanga wakamirirwa nomwoyo wose nokuti, maererano neCDC, vanhu vanenge 35 000 gore negore vakaremara nemhaka yepolio muUnited States muma1940 nema1950. Muna 1938, Roosevelt akavamba National Foundation for Infantile Paralysis, sangano rinozivikanwa nhasi seMarch of Dimes Foundation, kurwisa polio. Sangano racho rakatsigira nemari mishonga miviri yokudzivirira - mumwe wakagadzirwa naSalk uye mumwe naAlbert Sabin - waizotungamirira kukudzivirirwa kwechikamu chikuru chenyika kupokana neporiyo. Mushonga waSalk, wakagadzirwa muma1950, waibatanidza kuisira utachiona uhwo "hwakaurawa", nepo mushonga waSabin - waakashanda nawo muma1960 uye waipiwa nomuromo - waiva neshanduro yakaderedzwa yepolio. Mushonga weSabin wakabatsira chaizvo kusimbisa kudzivirira zvirwere munzanga kupfuura munhu mumwe nomumwe nokuti vanhu vanobudisa utachiona hwakaderera muzvimbambaira zvavo. Yakauya kuzotsiva mushonga waSalk munzvimbo dzakawanda pakati pa1963 na1999, maererano neSmithsonian. Asi rudzi rwoutachiona "rwakaurawa" rwunopinzwa nejekiseni ndirwo runopiwa muUnited States nhasi nemhaka yechiitiko chisingawanzoitiki...
Mushonga waSalk wakatanga nokubaiwa kwevana vechikoro muna April, 1955. Chirwere cheporiyo chakaziviswa kuti chakanga chaparadzwa muU.S. muna 1979, asi chichiripo mune dzimwe nyika. Chipfeko chitsva chetsono chinoshandiswa nyore nyore nevashandi vasina kunyatsodzidziswa.