But Brandon Hill, the president and CEO of Vivent Health, worries that those numbers could climb after the federal government drastically cut funding for prevention and treatment of HIV. “PrEP for HIV prevention is over 90 percent effective when the treatment regimen is followed,” Hill said. Early this year, the U.S. Department of Health and Human Services considered dismantling the Centers for Disease Control and Prevention’s Division of HIV Prevention. We treated our prevention services as key to the work that we do. How do we deliver the objectives set for $750 million in HIV prevention funds with only $75 million?