KnowraPolio vaccineLinked fromLinked fromThe 5 pages that link to Polio vaccine, each with the reason it gives.All 5Broader topic 1Related 2Narrower topic 2Inactivated 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.