Sophrosyne
Registered User
- Messages
- 1,543
Another line of defense, which is a good thingAccording to the HSE chief, Paul Reid, in today's Irish Times, about 1,000 antigen tests a day have been sent out to asymptomatic close contacts of Covid cases.
I was surprised by that too. When you add in the up to 50% false negatives into the mix, I think we did well not to depend on them too heavily.Strange results from positive antigen tests with followup negative pcrs:
I don't see what the goal of such a scam would be when they know the PCR test will be negative.I'm wondering are people scamming the system, is it just people's word that they tested themselves and got a positive result that then subsequently tested negative on professional pcr test.
After the Irish report I did a little searching and turns out high false positive rates have been reported elsewhere and for more than a year at this stage. Here's a study from earlier this year on the burden caused by similar rates of false positives in Germany.if that was true it would be picked up in Germany or uk where they have been using them for ages
Minimum standards allow for tests with 80% sensitivity, but in reality most places are seeing false positive rates far in excess of that tolerance. The specificity assumes an ideal sample, and accuracy is significantly affected by the user, with untrained testers in study last year returning a ~50% false negative rate.Bought the antigen tests today. The leaflet says they have a 99% sensitivity and a 98% specificity.
Have you got those the wrong way round? The way I try and work out which is which is ask what does 100% sensitive mean? It means you never get a false negative. Similarly 100% specific means nothing else can give a positive result i.e. no false positives.Minimum standards allow for tests with 80% sensitivity, but in reality most places are seeing false positive rates far in excess of that tolerance. The specificity assumes an ideal sample, and accuracy is significantly affected by the user, with untrained testers in study last year returning a ~50% false negative rate.
Yeah, it means you never get a false negative provided with a perfect sample. In the real world it seems many people fail to take an effective sample.The way I try and work out which is which is ask what does 100% sensitive mean? It means you never get a false negative.
On social media there are a lot of reports of false positives with Genrui brand which i think is sold in LIDL.Failed a Lidl test on Christmas day after eating too much for the dinner.
Did 2 follow up tests with kits from different manufacturers and both were negative. The 2nd and 3rd tests were obtained from a visiting emigrant curtesy of the NHS.
I suspect eating too much for the dinner was the cause of the positive test.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?