KnowraPolio vaccineLinked fromLinked fromThe 5 pages that link to Polio vaccine, each with the reason it gives.All 5Broader topic 1Related 2Narrower topic 2University of PennsylvaniaRelated: Jonas Salk developed his inactivated polio vaccine while working at Penn.Inactivated VaccineNarrower topic: The broader history of polio vaccination includes both inactivated and live-virus approaches.Jonas SalkNarrower topic: Salk’s work produced the first widely used vaccine in this broader category.Henrietta LacksRelated: HeLa cells helped Jonas Salk test whether his polio vaccine worked.John Franklin EndersBroader topic: Enders’s discovery helped make the virus supply needed for polio vaccines practical.