researcher unveils sensor that rapidly detects COVID-19 with
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Caltech researchers have developed a new type of multiplexed test (a test that combines multiple kinds of data) with a low-cost sensor.

Sensor named SARS-CoV-2 RapidPlex may enable the at-home diagnosis of a COVID infection through rapid analysis of small volumes of saliva or blood, without the involvement of a medical professional, in less than 10 minutes.

Sensors are made of graphene, a sheet-like form of carbon. A plastic sheet etched with a laser generates a 3D graphene structure with tiny pores.

Those pores create a large amount of surface area on the sensor, which makes it sensitive enough to detect, with high accuracy, compounds that are only present in very small amounts.

SARS-CoV-2 RapidPlex, contains antibodies and proteins that allow it to detect the presence of the virus itself and chemical markers of inflammation, which indicate the severity of the COVID-19 infection.

Established COVID-testing technologies usually take hours or even days to produce results. Those technologies also require expensive, complicated equipment, whereas this is simple and compact.

So far, the device has been tested only in the lab with a small number of blood and saliva samples obtained for medical research purposes from individuals who have tested positive or negative for COVID-19.

Though preliminary results indicate that the sensor is highly accurate, a larger-scale test with real-world patients rather than laboratory samples must be performed to definitively determine its accuracy.

Source: https://www.caltech.edu/about/news/caltech-researcher-unveils-sensor-rapidly-and-simultaneously-detects-covid-19-infection-status-severity-and-immunity
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