A demonstration of the "test" on a single person, when you don't actually know if they have been infected and therefore don't know what the "right" result should be, is completely useless.Fergus Walsh did a piece for Newscast last night explaining the various tests and availability. There's currently no approved antibody test. Several are being evaluated, some have failed. A company in Northern Ireland provided him with a sample antibody test that they're offering to the government to show how it works. Fingerprick, two drops of blood into a plastic tray, add drop of reagent, wait 10 minutes. He did it on air and was surprised to get two lines which signifies a positive antibody response. He said he hadn't had the 'classic' symptoms. About two weeks ago when he was working 15 hour days, he became very tired and wasn't sleeping well. That's the extent of the symptoms he could recall. But the test may not be accurate.
ETA: the antibody test is ideally done 28 days after an infection.
The presenter and producer of this show are idiots.