FILE - In this Tuesday, May 11, 2021 file photo, Dr. Peter Marks, director of the Center for Biologics Evaluation and Research in the Food and Drug Administration, testifies during a Senate health, education, labor, and pensions hearing to examine an update from federal officials on efforts to combat COVID-19 on Capitol Hill in Washington. On Friday, Sept. 10, 2021, Marks urged parents to be patient, saying the agency will rapidly evaluate vaccines for 5- to 11-year-olds as soon as it gets the needed data. (Jim Lo Scalzo/Pool via AP)
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