John Barry of Tulane University speaks about pandemics of the past century and the lessons that were learned — or not learned.
He advised the Bush and Obama administrations on pandemic preparedness and response and he's the award-winning author of "The Great Influenza: The Story of the Deadliest Pandemic in History."
John Barry spoke on Thursday at the St. Olaf College Institute for Freedom and Community in Northfield, Minn.
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