Montreal study shows rapid COVID-19 tests have limited effectiveness in schools
The results of a study that looked at the effectiveness of rapid COVID-19 tests in two Montreal high schools found the tests could be effective in areas where outbreaks were already suspected, but were far less effective as a blanket preventive tool used randomly
Quach said out of 4,500 children tested, only five positive cases were detected, a much smaller number than would be expected.
She said rapid tests are less sensitive than the diagnostic tests currently used at testing centres, also known as PCR (polymerase chain reaction) tests.
Ok but the article doesn't mention if they also tested the same students with PCR so are they just assuming that they got "a much smaller number than would be expected"?
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