In 2006, the CDC shared revised guidance recommending HIV testing be provided to individuals 13-64 years of age, regardless of risk, in all health-care settings unless patients opt out of the service. This approach, known as Routine Opt-Out HIV Testing (ROOT), is key in identifying persons with undiagnosed HIV, persons previously testing positive but not engaged in HIV care or virally suppressed, and persons testing negative that could be referred to preventative services.