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Fmr. Harvard public health dean: ‘With luck there will be more than one vaccine’

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Dr. Harvey Fineberg, the former dean of the Harvard School of Public Health, explains to Lawrence O'Donnell why it will be crucial to have more than one coronavirus vaccine that passes efficacy and safety standards. Dr. Fineberg also calls on countries to work together now to ensure "equitable sharing" of effective vaccines around the world.

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