President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del. (AP Photo/Matt Slocum)

President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del., as Vice President-elect Kamala Harris listens. (AP Photo/Matt Slocum)

President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del. (AP Photo/Matt Slocum)

President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del. (AP Photo/Matt Slocum)

President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del., as Vice President-elect Kamala Harris listens. (AP Photo/Matt Slocum)

President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del. (AP Photo/Matt Slocum)

President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del. (AP Photo/Matt Slocum)

President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del., as Vice President-elect Kamala Harris listens. (AP Photo/Matt Slocum)

President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del., as Vice President-elect Kamala Harris listens. (AP Photo/Matt Slocum)

President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del. (AP Photo/Matt Slocum)

President-elect Joe Biden speaks about the COVID-19 pandemic during an event at The Queen theater, Thursday, Jan. 14, 2021, in Wilmington, Del. (AP Photo/Matt Slocum)