DENVER (AP) — Colorado Gov. Jared Polis is urging all residents to wear cloth masks each time they leave home, in another measure to stem the spread of the deadly coronavirus.

Polis cited effective virus containment strategies in South Korea and Taiwan as he called for wearing a homemade mask, fashioned of cloth, or a scarf when running essential errands permitted under the state’s shelter-in-place order.

His do-it-yourself suggestion reflects the vast shortages of face masks and other personal protective gear that U.S. states are coping with as their health care networks confront the pandemic.

The Trump administration says the Centers for Disease Control and Prevention is recommending similar advice for the U.S.