The Biden administration is racing against the dropping temperatures to convince more Americans to get the updated Covid-19 booster shot amid low uptake numbers driven by confusion over the shot, declining infection numbers and profound pandemic fatigue. Krista Mahr talks with Grace Scullion about what the Biden administration's messaging strategy is and whether it's working. Plus, William Schaffner, medical director for the National Foundation for Infectious Diseases, on the limitations of the CDC.

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