The U.S. is recommending a pause for distribution of the single-dose Johnson & Johnson COVID-19 vaccine to investigate reports of potentially dangerous blood clots in 6 patients. Dr. Paul Offit is the Director of the Vaccine Education Center at Children's Hospital of Philadelphia and a member of the FDA vaccine advisory committee, he joins KYW Newsradio in Depth to break down what they think happened, why they're pressing pause on the vaccine, and what's going to happen next.

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