A new device from can detect COVID-19 in the air, which can help stop the spread of the virus.
he COVID-19 pandemic will forever be associated with unprecedented lockdowns and inconveniences such as wearing masks in public. And that’s largely because health experts had no idea exactly where the SARS-CoV-2 virus was lurking, and how risky crowded settings such as workplaces, classrooms, and public transportation were.
In lab tests, the device was 77% to 83% accurate in detecting the COVID-19 virus, including its latest variants. When the researchers tested different concentrations of virus on their device and two commercially available air detectors, theirs was the only one able to detect low levels of viral genetic material in the form of RNA.
Viral RNA exhaled or expelled by an infected person doesn’t remain in droplet form, but becomes aerosolized into particles five to 10 micrometers in diameter . Given that a room with a single infected individual can contain as few as 10 RNA copies of the SARS-CoV-2 virus per cubic meter of air, the odds of picking up something that small in a typical room is about one in a million or one in a billion. “It’s like finding a needle in a haystack,” says Chakrabarty.
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