Biden taps former FDA chief Kessler to lead vaccine science

President-elect Joe Biden has picked a former Food and Drug commissioner to lead vaccine science in his drive to put 100 million shots into the arms of Americans in his administration's first 100 days and stem the Covid-19 pandemic. Kessler will work out of the federal Department of Health and Human Services, assuming responsibility for the scientific side of Operation Warp Speed, an effort launched under the Trump administration to rapidly develop vaccines and treatments.