America needs more face masks to confront the coronavirus. Karen Vacaliuc has plenty to offer: in gingham, stripes and jungle prints.

Shortly after wrapping up with the local high-school musical, “The Little Mermaid,” the Oak Ridge, Tenn., costume designer read that health-care workers faced a shortage of masks due to an expected surge of Covid-19 patients. She dug into the “30 or 40” bins of fabric she has at home, found patterns for fabric face masks online, and got to work.

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