thedemon 1,577 Posted October 24, 2020 Share Posted October 24, 2020 13 minutes ago, NanLaew said: For current infection, the standard PCR swab test, ie. long cotton bud on back of throat and up each nostril. Has a reported ~2% false -ve rate and a reported ~5% false +ve rate. I think the shonky test kits were the antibody ones that test blood for past infection. A 5% false positive rate may not sound excessive but it depends how the test is being used. If it is used for testing on an apparently high risk individual where any positive result will mean further tests are done thereby reducing the margin of error that's ok. But when used for population wide testing (such as the UK is doing with PCR) and the expected rate of real positives may be as low as 1%, then a false positive rate of 5% means that of all positive results from that testing, 20% will be real and 80% will be false. That renders the resulting data worthless. Link to post Share on other sites
Whale 284 Posted October 24, 2020 Share Posted October 24, 2020 9 minutes ago, EricTh said: This is strange.... How did a tourist come in on 30 Sept when it is supposed to be closed for all tourists? ........ Not a tourist? She was probably a family member of the husband who has a suitable visa OR she has a suitable visa and the husband was family member. What caught my eye was they visited the Embassy immediately after ASQ, a simple tourist or even long stayer would not do that, so I assume it was "business" related in some way. Link to post Share on other sites
crazygreg44 1,163 Posted October 24, 2020 Share Posted October 24, 2020 1 hour ago, richard_smith237 said: Regarding the French lady, there are a number of possibilities: - She contracted Covid-19 from elsewhere, as nothing is water tight, even quarantine - She has a regular cold and exhibits symptoms, the Covid-19 test was a false positive - She has carried Covid-19 for a few weeks (asymptomatic), she is one of the extremely rare cases where Covid-19 developed outside of the usual window add to the possibilities regarding that the incubation period can be up to 27 days, she could have contracted the Virus in France, way before her flight. The requirement to show a Covid-19 PCR test with a minimum age of 72 hours prior to boarding the flight, could have left an open window between the test and the actual boarding, during which she could have gotten infected. It then only takes a few flaws to occur with the subsequent 2 more tests during the quarantine, to slip through the screens Link to post Share on other sites
Popular Post damascase 2,294 Posted October 24, 2020 Popular Post Share Posted October 24, 2020 25 minutes ago, EricTh said: Aren't everybody supposed to get a Covid free cert in country of origin first? Only the foreigners; returning Thais do not need a pre-flight Covid test. Doesn’t make sense...... 4 Link to post Share on other sites
Whale 284 Posted October 24, 2020 Share Posted October 24, 2020 Theres a rumour that she is not French but a dual Thai national but I find it hard to believe that the propaganda machine would be that biased to get that wrong. 1 Link to post Share on other sites
richard_smith237 26,101 Posted October 24, 2020 Share Posted October 24, 2020 6 minutes ago, crazygreg44 said: 2 hours ago, richard_smith237 said: Regarding the French lady, there are a number of possibilities: - She contracted Covid-19 from elsewhere, as nothing is water tight, even quarantine - She has a regular cold and exhibits symptoms, the Covid-19 test was a false positive - She has carried Covid-19 for a few weeks (asymptomatic), she is one of the extremely rare cases where Covid-19 developed outside of the usual window Expand add to the possibilities regarding that the incubation period can be up to 27 days, she could have contracted the Virus in France, way before her flight. The requirement to show a Covid-19 PCR test with a minimum age of 72 hours prior to boarding the flight, could have left an open window between the test and the actual boarding, during which she could have gotten infected. It then only takes a few flaws to occur with the subsequent 2 more tests during the quarantine, to slip through the screens Agreed... a Multitude of possibilities. When Thailand is attempting to be ‘water tight’ the smallest of flaws will be highlighted. ---- While so many are panicking about 1 case of Covid-19 there are so many other bigger issues to deal with. All that is truly required to control Covid-19 is to keep the R number (infection spread rate) below 1 in any community. The Covid-19 RT PCR test taken before departure covers the vast majority of cases. Careful monitoring of hospital admissions and those with symptoms takes care of the rest. The world could open back up, but it has tested itself into a panic. Link to post Share on other sites
Whale 284 Posted October 24, 2020 Share Posted October 24, 2020 11 minutes ago, crazygreg44 said: add to the possibilities regarding that the incubation period can be up to 27 days, she could have contracted the Virus in France, way before her flight. The requirement to show a Covid-19 PCR test with a minimum age of 72 hours prior to boarding the flight, could have left an open window between the test and the actual boarding, during which she could have gotten infected. It then only takes a few flaws to occur with the subsequent 2 more tests during the quarantine, to slip through the screens I thinks thats too many what ifs Greg. I am guessing the answer will be the simplest one. Link to post Share on other sites
bodga 7,217 Posted October 24, 2020 Share Posted October 24, 2020 2 hours ago, richard_smith237 said: An article submitted in the Lancet on September 29 suggests that Covid-19 RT PCR tests (in the UK) are suspected to have a false positive rate of between 0.8 and 4.0% https://www.thelancet.com/journals/lanres/article/PIIS2213-2600(20)30453-7/fulltext Obviously those who present symptoms and also test positive fall well below the 0.8 to 4.0% false positive estimate outlined in the medical paper, however, when testing en masse i.e. 200,000 people daily the incidence of false positives could be significant. Significant enough to warrant policy change and further lockdowns when it's unnecessary. Given the information on false positives - any positive test should really be carried out twice to confirm the result. Regarding the French lady, there are a number of possibilities: - She contracted Covid-19 from elsewhere, as nothing is water tight, even quarantine - She has a regular cold and exhibits symptoms, the Covid-19 test was a false positive - She has carried Covid-19 for a few weeks (asymptomatic), she is one of the extremely rare cases where Covid-19 developed outside of the usual window including her flight Link to post Share on other sites
Popular Post richard_smith237 26,101 Posted October 24, 2020 Popular Post Share Posted October 24, 2020 Just now, Whale said: Theres a rumour that she is not French but a dual Thai national but I find it hard to believe that the propaganda machine would be that biased to get that wrong. It would be a relief for the xenophobic reporting... IF the lady in question is both French and Thai, the reality is, legally, in Thailand she is Thai as her Thai Nationality takes precedence. For the media hysteria, it fits a far better rhetoric - French Woman, rather than Thai woman.... 3 Link to post Share on other sites
eisfeld 2,227 Posted October 24, 2020 Share Posted October 24, 2020 3 hours ago, Sharp said: Although I agree the 70+ figure doesn't match up should be 5.4% The other age ranges as well. They are all off by two orders of magnitude. Or maybe the missing cases that neither died nor are living are Schroedinger Patients. They are simultaneously dead and alive until their pulse is measured. 1 Link to post Share on other sites
RichardColeman 26,380 Posted October 24, 2020 Share Posted October 24, 2020 2 hours ago, AbeNormal said: early on China supplied rapid test kits to various countries including the UK, they were soon deemed useless and inaccurate and were returned to China Sure bet we did not get a refund for it - you'd think that China should be forced to pay for the entire world's test kits, protection wear and vaccine - but they won't , ther're the only nation making a mint from it Link to post Share on other sites
ukrules 20,833 Posted October 24, 2020 Share Posted October 24, 2020 5 hours ago, rooster59 said: Her husband and child were negative Where are they right now is the question everyone should be asking..... Link to post Share on other sites
ukrules 20,833 Posted October 24, 2020 Share Posted October 24, 2020 2 hours ago, Jack Mountain said: 2 Days later sick, too soon! Many people get sick within 2 to 3 days elsewhere in the world, 14 days would be unusually long, that's why 14 is used for the quarantine. 1 Link to post Share on other sites
ukrules 20,833 Posted October 24, 2020 Share Posted October 24, 2020 1 hour ago, richard_smith237 said: While so many are panicking about 1 case of Covid-19 there are so many other bigger issues to deal with. What makes you think anyone's panicking? 1 Link to post Share on other sites
Scot123 3,259 Posted October 24, 2020 Share Posted October 24, 2020 5 hours ago, welovesundaysatspace said: Please elaborate how that works in detail. Because I believe it’s a load of nonsense: PCR generally is highly reliable and one of the best testing technology that exists in modern diagnostic, and many Covid-19 PCR seem to have sensitivity and specificity rates of up to 99.9%. Keep dreaming. Link to post Share on other sites
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