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Biden renews Covid vaccine push after falling short of July Fourth goal

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The U.S. fell short of President Biden’s goal of 70 percent of adults having had at least one dose of the Covid-19 vaccine by July Fourth as health officials are warning that the delta variant could cause a surge in cases. NBC News’ Dasha Burns explains how the White House is planning to get more adults vaccinated against the virus and how the delta variant is surging in other parts of the world.