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After fruitful 'pause,' CDC, FDA agree Johnson & Johnson Covid vaccinations can continue 

05:12

Dr. Ashish Jha, dean of the School fo Public Health at Brown University, talks with Rachel Maddow about the new information that was learned during a pause in vaccinations about the very rare blood clots a small number of recipients of the Johnson & Johnson Covid vaccine experienced, and how the medical community has been made aware of how to recognize and treat the side effect.