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What's Special About the Polio Vaccine?
CNN's John Defterios asks what was so special about the polio vaccine that allowed this cooperation to happen even in the first place. The story of all the Americans already were vaccinated and the Soviet Union offering up hungry as a test bed for this vaccine, you know, it's hard to imagine something like that with all the stories around microchips," he says. "It is important to underscore that there are major differences" between the Cold War and current U.S.-China relations, defterios adds.