This clip, created by Yale researchers, can alert you to COVID exposure. Via Yale School of Public Health:
Now, Yale School of Public Health (YSPH) researchers have developed a passive air sampler clip that can help assess whether a person has been exposed to SARS-CoV-2, which could be especially helpful for workers in high-risk settings, such as health care facilities and restaurants. The device is described in the American Chemical Society journal Environmental Science & Technology Letters.
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