Dr. Andrea Marzi explains the ways vaccines work and how these treatments are vital for public health.This talk was filmed at TEDxHieronymusPark. All TEDx events are organized independently by volunteers in the spirit of TED's mission of ideas worth spreading. To view footnotes and learn more about TEDxSHORTS, the TEDx program, or give feedback on this episode, please visit http://go.ted.com/tedxshorts.

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