FILE – In this Jan. 16, 2010, file photo President Barack Obama, center, walks out of the Oval Office of the White House with former Presidents Bill Clinton, left, and George W. Bush, right, to deliver remarks in the Rose Garden at the White House in Washington. Three former presidents say they’d be willing to take a coronavirus vaccine publicly, once one becomes available, to encourage all Americans to get inoculated against a disease that has already killed more than 273,000 people nationwide. (AP Photo/Pablo Martinez Monsivais, File)
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