King County is moving closer to opening at least two public sites where drug users can inject heroin under supervision.

The county’s Board of Health voted unanimously Thursday to endorse the sites, which would be the first of their kind in the nation.

A task force, made up of experts on heroin and opioid abuse, recommended the supervised injection sites in September, as a way to reduce the wave of overdose deaths that has wracked Seattle and King County in recent years.

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