FILE - In this Sept. 17, 2020, file photo, Rep. Lou Correa, D-Calif., questions witnesses during a House Committee on Homeland Security hearing on "worldwide threats to the homeland," on Capitol Hill Washington. Democratic Rep. Lou Correa announced Saturday, Jan. 16, 2021 he tested positive upon returning home from Washington, D.C., prompting him to self-quarantine away from his family. His office said he received the first dose of the Pfizer-BioNTech vaccine on Dec. 19 and has not received the second shot that would have boosted his immunity to about 95%. (Chip Somodevilla/Pool via AP, File)

FILE - In this July 28, 2020, file photo, Rep. Lou Correa, D-Calif., questions Attorney General William Barr during a House Judiciary Committee hearing on the oversight of the Department of Justice on Capitol Hill in Washington. Rep. Correa announced Saturday, Jan. 16, 2021 he tested positive upon returning home from Washington, D.C., prompting him to self-quarantine away from his family. His office said he received the first dose of the Pfizer-BioNTech vaccine on Dec. 19 and has not received the second shot that would have boosted his immunity to about 95%. (Matt McClain/The Washington Post via AP, Pool, File)