https://news.engineering.utoronto.ca/meet-the-u-of
Post# of 22456
"The test is based on quantum dots, nano-scale particles that glow in bright colours when struck by light. These particles can be fitted into umpteen microscopic machineries, each looking for signs of the virus while emitting a unique spectrum of light that can be harnessed for test readout. Such collective chemistry produces more data points and serves to increase confidence in test results.
The test is also rapid, revealing results in under an hour, and it can be carried out outside hospitals or specialized labs. On-the-go testing like this employs a relatively recently developed chemistry in which DNA is amplified at constant temperature unlike the standard method that requires frequent temperature changes obtainable only with specialized instruments."