As far as I can see, the swab tests are a waste of time, and totally unreliable, my Daughter in law has had a test this week, so that she could go in for a routine Op, and she's tested positive, despite the fact that she has already tested positive Three months ago, when she was actually ill.
This time she has no symptoms at all.
When she questioned the test results, she was told that the Test locates a certain RNA in the Virus, and it can detect it up to 90 days after you have been infected, unfortunately the test can't differentiate between an active strand and a dead strand.
Makes you wonder how many of these thousands of cases recently are people who have already had it and didn't know, or people who have already had it, and the test is picking up on dead cells.
To make matters worse, my Son has had to to self isolate, and has had to book Holidays because he couldn't afford to make do on sick pay !!!