Reports of conflicting results are common if mystifying; however, scientists have a number of explanations
Lateral flow tests are an increasing part of our everyday lives. But for some individuals, a persistent clash with their PCR test results is undermining their confidence in the system.
Anna Brading of Reading received a warning from her son’s headteacher, because he had missed so much school as a result of having to self-isolate. “We have no way of telling when he actually gets Covid and I have vulnerable family members that we want to see,” she said. over long periods of time and without symptoms is extremely low, said Yates. “Consistent false negatives – perhaps due to poor swabbing technique – would be easier to explain away, but not false positives.”In October, UKHSA suspended PCR testing at a laboratory in Wolverhampton after an investigation into reports of people receiving negative PCR results after a positive LFT.
Because different manufacturers use different reagents in their test kits, some kits may be more susceptible to this problem than others, Edwards suggested. Indeed, many Guardian readers claim to only test positive on certain brands of LFT – particularly FlowFlex kits.
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