In this March 26, 2021, photo, a member of the Philadelphia Fire Department prepares a dose of the Johnson & Johnson COVID-19 vaccine at a vaccination site setup at a Salvation Army location in Philadelphia. With the U.S. pause of the vaccine, authorities are weighing whether to resume the shots the way European regulators decided to -- with warnings of a “very rare” risk. New guidance is expected late Friday, April 23, after a government advisory panel deliberates a link between the shot and a handful of vaccine recipients who developed highly unusual blood clots. (AP Photo/Matt Rourke) **FILE**
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