COVID variants remain the top threat. So the U.S. is establishing a $1.7B network to track them. Updated 10:37 PM; Today 10:37 PM President Joe Biden speaks during a ceremony to honor slain U.S. Capitol Police officer William "Billy" Evans as he lies in honor at the Capitol in Washington, Tuesday, April 13, 2021. (AP Photo/J. Scott Applewhite, Pool)AP Facebook Share The U.S. is establishing a $1.7 billion network to identify and track worrisome coronavirus mutations whose spread could trigger another pandemic wave, the Biden administration announced Friday. White House officials unveiled a strategy that features three components: a major funding boost for the Centers for Disease Control and Prevention and state health departments to ramp up coronavirus gene-mapping; the creation of six “centers of excellence” partnerships with universities to conduct research and develop technologies for gene-based surveillance of pathogens, and building a data system to better share and analyze information on emerging disease threats, so knowledge can be turned into action.