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The Conversation: Addressing local environmental issues; History of Jonas Salk and his polio vaccine

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Dr. Jonas Salk, the Pittsburgh scientist who discovered the Polio vaccine, administers an injection to an unidentified boy at Arsenal Elementary School in Pittsburgh, Pa., Feb. 23, 1954. (AP Photo)
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Dr. Jonas Salk, the Pittsburgh scientist who discovered the Polio vaccine, administers an injection to an unidentified boy at Arsenal Elementary School in Pittsburgh, Pa., Feb. 23, 1954. (AP Photo)
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Catherine Cruz is the host of The Conversation. Contact her at ccruz@hawaiipublicradio.org.
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