RE: DnaNudge Lab-in-Cartridge test13 Apr 2020 15:18
Sensitivity is the percentage of persons with the disease who are correctly identified by the test. Specificity is the percentage of persons without the disease who are correctly excluded by the test. Clinically, these concepts are important for confirming or excluding disease during screening.
So if a test is only 90% accurate and you are doing 100,000 tests per day the govt end of April daily target then on average 10000 people will be false positive and another 10000 false negative so you can see how the numbers can easily ramp up.
Given the fact someone tests negative( including the false one in ten) they are likely to behave in a less strict fashion/ not to be in self isolation hence likely to infect more people).Also the false positive one will be investigated ie contact traced with effort.
Also by giving an individual more tests yes you will reduce the chance of it been wrong but how often do you repeat the test and why would you repeat it unless something changed like symptoms etc and of course you do not know which individual s are tested correctly or not.
Plus what if the efficacy is only 80% riptide gets exponential.
My experience is only using a rapid point of care tests in cats assessing FeLV and FIV both deadly virus,s.That was a whole blood test which was 97/98% accurate so pretty decent.
We still had false negatives and positives but on the whole worked well.The consequences of a false diagnosis are huge in terms of outcomes so to keep these to a minimum is a major factor.
ATB