UC San Diego developing sticker that works as a simple COVID-19 test on masks

The sticker, placed on the outside of your mask, collects droplets from other people's breath. At the end of the day, you can find out if you've been exposed to COVID just by clicking a button.

SAN DIEGO -- UC San Diego researchers are developing a simple way to test for COVID-19 risk. The technology comes in the form of a sticker placed on the outside of your mask.

"This could have a really profound impact on the trajectory of the pandemic," Jesse Jokerst, an associate professor at UC San Diego, told KGTV.

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The test looks for the presence of a specific COVID-19 protease in people's breath. As someone wears the sticker on the mask throughout the day, it collects droplets.

"At the end of the day, you click a little blister pack, and if it changes color, that means that you might have been exposed to COVID and that you should seek out some additional testing," Jokerst said.
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The test uses a technique called "Colorimetric Detection," similar to home-pregnancy test indicators.

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Jokerst likens it to a smoke alarm. The test won't tell you exactly what's going on, but it serves as a warning that you need to take further action for safety.

"That's what we were trying to develop. It's a device that could say, 'Hey, today there's an elevated risk, and everybody should seek some additional testing,'" Jokerst explained.
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This kind of color-based test has never been used for viral detection.

Jokerst says that once the pandemic ends, these tests could still assess the risk of diseases like SARS and MERS.
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KGTV contributed to this report.

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