In historic Covid-19 adcomm, vaccine experts debate a sea of questions — but offer no clear answers
The most widely anticipated and perhaps most widely watched meeting in the FDA’s 113-year history ended late Thursday night with a score of questions and very few answers.
For nearly 9 hours, 18 different outside experts listened to public health agencies and foundations present how the United States’ Covid-19 vaccine program developed through October, and they debated where it should go from there: Were companies testing the right metrics in their massive trials? How long should they track patients before declaring a vaccine safe or effective? Should a vaccine, once authorized, be given to the volunteers in the placebo arm of a trial?
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