The first Johnson & Johnson vaccines have been shipped. What's next?
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If Pfizer and Moderna threw the first big punches, if all goes well, Johnson & Johnson may be the blow that COVID never saw coming. NBC News Correspondent Ellison Barber, NBC News Reporter Vaughn Hillyard, and lead researcher for the Johnson & Johnson vaccine, Dr. Dan Barouch join Katy Tur to discuss.March 1, 2021
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