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

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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AP
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. Originally from Guam, she spent more than 30 years at KITV, covering beats from government to education. Contact her at ccruz@hawaiipublicradio.org.
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