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Full Fact4y
What’s a PCR test cycle threshold and why it matters
The World Health Organisation confirmed that the PCR test is flawed and all tests with a high cycle threshold (Ct) are invalid. Our verdict False. It reiterated guidance that tests with a high Ct may ...
Reuters4y
Fact Check: The WHO did not say PCR tests are ‘invalid’; a Canadian article has misrepresented quotes in a WHO notice written for professional scientists
An article shared on social media has falsely claimed the World Health Organisation (WHO) has admitted numbers of COVID-19 cases are “meaningless” due to “invalid” PCR tests.
The Hindu3y
RT-PCR: Cycle threshold value does not hold clinical relevance
At present, the most often repeated number appears to be the cycle threshold value (Ct value) reported on an RT-PCR at the time of diagnosis. An RT-PCR test detects genetic material in a sample ...
The Daily Telegraph3y
‘Shambolic’ Covid PCR testing rules meant one in three who isolated were never contagious
Up to a third of people who tested positive for coronavirus by Polymerase Chain Reaction (PCR) tests were not contagious ... There is no definitive cycle threshold level for positivity.