Breadcrumb Home News As COVID-19 Vaccine Trials Move At Warp Speed, Recruiting Black Volunteers Takes Time As COVID-19 Vaccine Trials Move At Warp Speed, Recruiting Black Volunteers Takes Time September 11, 2020 Rachel Hardeman, PhD, MPH is quoted. Previous News Christopher Wong Michaelson, PhD, Has Been Named the Koch Endowed Chair for Business Ethics at the University of St. Thomas Daniel Groll, PhD, Has Been Selected As One of the Mellon Periclean Faculty Leaders in the Humanities Rachel R. Hardeman, PhD, MPH, Joins the Hastings Center Board of Directors