Fauci worried about delta variant spread 'if we don't do the right thing'
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Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, talks with Rachel Maddow about why the role unvaccinated people play in generating new variants that can ultimately hurt even vaccinated people, and the best way to balance Covid safety with the need for children to return to school.Aug. 10, 2021
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