As the novel coronavirus spread rapidly across the United States this March, testing was lacking. While there were many problems, one simple one was a lack of test swabs. These nasopharyngeal swabs go into patients’ noses to grab a sample to test. To scale up testing, the country needed tens of millions—or perhaps hundreds of millions—of them. One major solution emerged: 3D printing. In this video, we look at how the country’s biggest 3D printing companies rushed to design and manufacture vast quantities of these test swabs.

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