In this Jan. 8, 2021, file photo, Kizzmekia Corbett, left, an immunologist with the Vaccine Research Center at the National Institute of Health, and the Rev. Jesse Jackson, respond to questions after Jackson received his first COVID-19 vaccine at the Roseland Community Hospital in Chicago. Corbett, a Black U.S. government scientist who helped develop Moderna’s vaccine, acknowledges ”centuries of medical injustice” against Black Americans but said COVID-19 vaccines resulted from years of solid research. Trust in those vaccines, she said, is needed to save lives. (AP Photo/Charles Rex Arbogast, File)