RE: Telegraph25 Mar 2021 06:09
Deems needs to be gagged! According to him we “may already be at the point where we should stop lft testing because it’s too inaccurate.
Lateral flow Covid testing too inaccurate to be used in mass screening, review finds
A study found that asymptomatic testing only picked up around 50 per cent of cases
“Jon Deeks, the review author and a professor of biostatistics at the University of Birmingham, said it was "shocking" that the Government had allowed the rollout of such a "large, invasive and expensive" testing programme without the data to back it up.
“It is being used in ways which actually risk people getting false reassurance when they miss cases, and getting false positives, and that has been a big problem in schools. There are instances when whole classes have been sent home – effectively, 100 people put into isolation."
Prof Deeks added: "So I think there are big problems in the way that we're using this. And when prevalence drops you get more false positives and fewer true positives, that's a mathematical certainty, and there is a point where you should stop. We may already be at that point.”
Prof Deeks said the tests could be used on a "test to detect" basis but should not be used for "test to release" or "test to enable" but added: "A better role with these tests may be putting them in testing centres, where we would enable people to get those results before they leave a test centre – they work better for people with symptoms.
He said that, in schools last week, 2,500 tests were conducted to find just one case of Covid.
Public Health England defended the testing programme, with Dr Susan Hopkins, its Covid-19 strategic response director, saying: "Rapid tests are effective at detecting Covid in people that are highly infectious, both with and without symptoms.
"Every day, rapid testing is helping us find cases of Covid-19 that we wouldn't otherwise know about, breaking chains of transmission and potentially saving lives."