Until the HOPE Act — HIV Organ Policy Equity Act — passed in 2013, doctors were prevented from using organs from HIV-positive donors, even if they were intended for an HIV-positive patient.

Now that’s no longer an issue.

Segev estimates the number of HIV-positive would-be organ donors in the United States at 500-600 annually. Their organs could save more than 1,000 people.

A study by the University of Pennsylvania put the number of potential HIV-positive donors at nearly 400.