President Joe Biden announced Thursday (Jan. 13) that the U.S. government will purchase 500 million more at-home COVID-19 tests and take steps to make medical masks, including KN95s and N95s, available and free for Americans, in the hopes of stemming the rise in COVID-19 cases caused primarily by the Omicron variant. The government’s latest purchase of 500 million at-home tests -- which Biden said will help meet future demand -- is in addition to the 500 million tests the administration...