A lab technician sorts blood samples for a COVID-19 vaccination study at the Research Centers of America in Hollywood, Fla., on Aug. 13. Chandan Khanna/AFP via Getty Images hide caption
Fresh Air For Nov. 24, 2020: Vaccine Expert On COVID-19 And The Year Ahead Hear the Fresh Air program for November 24, 2020
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A lab technician sorts blood samples for a COVID-19 vaccination study at the Research Centers of America in Hollywood, Fla., on Aug. 13. Chandan Khanna/AFP via Getty Images hide caption