[quote DancingInTheGarden]**@whatswithtodaytoday* @tldr and @DamitJanet*
I DID listen to the full clip last night which is how I knew about it and how to find it. I might have quoted it incorrectly but that is exactly why I went and found the clip and linked to it so others could hear for themselves.
It is also a bit the way he phrased it "The false positive rate is very high [it or so] only 7% of tests will be successful in identifying those who have the virus"
So 7% of tests are true positives or true negatives.
The absolute figures around the false positives then is confusing but it is still a statistical nightmare and a lottery for scientific results.
If I developed a test with this rate of false results I would have been sacked for incompetence and the test binned.[/quote]
You misunderstood Raab - because he was very confusing / confused
SkyNews@SkyNews
Foreign Secretary Dominic Raab says the "challenge" with testing for #COVID19 in airports is 'the very high false positive rate'
and adds 'only 7% of tests will be successful in identifying those who have the virus'.
(video)
twitter.com/SkyNews/status/1308655561081225217
What Raab meant - if he understood the governments own publications -
is that there is a very high false negative rate especially on day of arrival
This government study on double testing for airport arrivals showed that
on day of arrival, only 7% of infected people showed as positive
However, after isolation, a 2nd test picked up 86% of those infected on day 6, or 98% if tested on day 10
Investigation into the effectiveness of “double testing” travellers incoming to the UK for signs of COVID-19 infection
assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/909382/s0544-phe-double-testing-travellers-170620-sage-42.pdf