WASHINGTON, May 28 -- The U.S. Department of Health and Human Services Centers for Disease Control and Prevention announced that it expects to award a cooperative agreement for the mass mailing of HIV self-tests. The agency description of the cooperative agreement states: "In the United States as of 2019, an estimated 13% of persons with HIV were unaware of their HIV infection. This group accounts for a disproportionate number of new infections each year. Gay, bisexual, and other men who have s more ST