Anthony Fauci, who left government service in 2022 after advising seven presidents and managing responses to HIV, Ebola, and the 2001 anthrax attacks, will testify before Congress for the second time since his departure. More than 150 infectious disease experts signed a 2020 letter stating that no credible evidence supports charges against him and that the allegations have produced five years of harassment and threats against Fauci and his family. The hearing focuses on pandemic origins amid ongoing partisan debate.