President-elect Joe Biden speaks during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020, to announce his health care team. Vice President-elect Kamala Harris listens at right. (AP Photo/Susan Walsh)

President-elect Joe Biden speaks during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020, to announce his health care team. (AP Photo/Susan Walsh)

President-elect Joe Biden speaks during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020, to announce his health care team. (AP Photo/Susan Walsh)

President-elect Joe Biden speaks during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020, to announce his health care team. (AP Photo/Susan Walsh)

President-elect Joe Biden speaks during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020, to announce his health care team. Dr. Vivek Murthy has been nominated by Biden to serve US Surgeon General. (AP Photo/Susan Walsh)

President-elect Joe Biden speaks during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020, to announce his health care team. (AP Photo/Susan Walsh)

President-elect Joe Biden speaks during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020, to announce his health care team. (AP Photo/Susan Walsh)

FILE - In this March 5, 2019, file photo, California Attorney General Xavier Becerra speaks during a news conference in Sacramento, Calif. President-elect Joe Biden has picked Becerra to be his health secretary, putting a defender of the Affordable Care Act in a leading role to oversee his administration’s coronavirus response. (AP Photo/Rich Pedroncelli, File)

FILE - In this Thursday, Aug. 2, 2018, file photo, California Attorney General Xavier Becerra talks to reporters after a news conference at UCLA. President-elect Joe Biden has picked Becerra to be his health secretary, putting a defender of the Affordable Care Act in a leading role to oversee his administration’s coronavirus response. (AP Photo/Jae C. Hong, File)

FILE - In this Dec. 4, 2019, file photo, California Attorney General Xavier Becerra speaks during a news conference in Sacramento, Calif. President-elect Joe Biden has picked Becerra to be his health secretary, putting a defender of the Affordable Care Act in a leading role to oversee his administration’s coronavirus response. (AP Photo/Rich Pedroncelli, File)

President-elect Joe Biden, right, and Vice-President-elect Kamala Harris, left, listen as a video of California Attorney General Xavier Becerra, who has been nominated by Biden to serve as secretary of Health and Human Services, is displayed during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020. (AP Photo/Susan Walsh)

President-elect Joe Biden speaks during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020, to announce his health care team. Vice President-elect Kamala Harris listens at right. (AP Photo/Susan Walsh)

President-elect Joe Biden speaks during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020, to announce his health care team. Dr. Vivek Murthy, center, who has been nominated by Biden to serve US Surgeon General listens. An image of California Attorney General Xavier Becerra who has been nominated by Biden to serve as secretary of Health and Human Services is displayed on a screen at right. (AP Photo/Susan Walsh)