A federal trial judge in Washington, D.C., on Wednesday declined to release adult immigrants held in family detention centers, acknowledging his ruling will require parents to decide whether to separate from their children or potentially expose them to the COVID-19 virus.

U.S. District Judge James Boasberg denied the motion for a preliminary injunction seeking the release of all adults held in the family detention centers, finding that petitioners in the case hadn’t reached the legal standard needed.