FILE - In this March 26, 2021, file photo, a member of the Philadelphia Fire Department administers the Johnson & Johnson COVID-19 vaccine to a person at a vaccination site at a Salvation Army location in Philadelphia. More Black Americans say they are open to taking the coronavirus vaccine amid campaigns to overcome a shared historical distrust of science and government. (AP Photo/Matt Rourke, File)

FILE - In this Feb. 11, 2021, file photo, Kizzmekia Corbett, an immunologist with the Vaccine Research Center at the National Institutes of Health (NIH) looks on as President Joe Biden visits the Viral Pathogenesis Laboratory at the NIH in Bethesda, Md. Corbett played a key role in developing the Moderna vaccine. (AP Photo/Evan Vucci, File)

FILE - In this Feb. 19, 2021, file photo, people wait in line at a 24-hour, walk-up COVID-19 vaccination clinic hosted by the Black Doctors COVID-19 Consortium at Temple University's Liacouras Center in Philadelphia. More Black Americans say they are open to taking the coronavirus vaccine amid campaigns to overcome a shared historical distrust of science and government. (AP Photo/Matt Rourke, File)

FILE - In this March 29, 2021, file photo, Brian Snipes receives a drive-thru vaccination at "Vaccine Fest," a 24-hour COVID-19 mass vaccination event in Metairie, La., just outside New Orleans, hosted by Ochsner Health System and the Jefferson Parish Government. More Black Americans say they are open to taking the coronavirus vaccine amid campaigns to overcome a shared historical distrust of science and government. (AP Photo/Gerald Herbert, File)

FILE - In this April 7, 2021, file photo, Wilbert Marshall, 71, left, pretends to be scared of receiving the COVID-19 vaccine from a nurse at the Aaron E. Henry Community Health Service Center in Clarksdale, Miss. Marshall, who was among a group of seniors from the Rev. S.L.A. Jones Activity Center for the Elderly who received their vaccinations, said he wanted the vaccination in order to stay safe and be able to visit with family without the constant fear of the virus. (AP Photo/Rogelio V. Solis)

Wilbert Marshall, 71, looks at his shot card after receiving the COVID-19 vaccine from Melissa Banks, right, a nurse at the Aaron E. Henry Community Health Service Center in Clarksdale, Miss., Wednesday, April 7, 2021. Marshall was among a group of seniors from the Rev. S.L.A. Jones Activity Center for the Elderly who received their vaccinations. More Black Americans say they are open to taking the coronavirus vaccine amid campaigns to overcome a shared historical distrust of science and government. (AP Photo/Rogelio V. Solis)

Wilbert Marshall, 71, looks at his shot card after receiving the COVID-19 vaccine at the Aaron E. Henry Community Health Service Center in Clarksdale, Miss., Wednesday, April 7, 2021. Marshall was among a group of seniors from the Rev. S.L.A. Jones Activity Center for the Elderly who received their vaccinations. More Black Americans say they are open to taking the coronavirus vaccine amid campaigns to overcome a shared historical distrust of science and government. (AP Photo/Rogelio V. Solis)

P.M. Browner, 88, speaks about her apprehension over receiving the COVID-19 vaccine, while waiting for a transportation bus at the Rev. S.L.A. Jones Activity Center for the Elderly to take her to receive a vaccination, Wednesday, April 7, 2021, in Clarksdale, Miss. She said she thinks vaccinations will eventually be required, and she wants to be able to continue to socialize at a local senior center. (AP Photo/Rogelio V. Solis)

P.M. Browner, 88, speaks about her apprehension over receiving the COVID-19 vaccine, while waiting for a transportation bus at the Rev. S.L.A. Jones Activity Center for the Elderly to take her to receive a vaccination, Wednesday, April 7, 2021, in Clarksdale, Miss. She said she thinks vaccinations will eventually be required, and she wants to be able to continue to socialize at a local senior center. (AP Photo/Rogelio V. Solis)