RE: Testing and yet more testing!17 Jun 2020 08:35
Oh dear that bastion of quality reporting - ‘The Daily Mail’. Let’s take another look ...
“An antigen test detects the presence (or absence) of an antigen, not antibodies. An antigen is a structure within a virus that triggers the immune system's response to fight off the infection. It can be detected in blood before antibodies are made.”
“An antigen test is effective because it can take a few days for the immune system to build enough antibodies to be detected in a test, however, antigens can be detected almost immediately after infection. So, in theory, the test can tell much sooner whether someone has the virus.”
If you have had the disease and recovered and produced antibodies (it’s not clear yet if everyone creates antibodies or even gets infected but is still a carrier). The upshot is BOTH tests are needed unless you are pursuing a ‘herd immunity’ strategy in which case you’d only use the antibody test as you want all to be infected eventually (if no vaccine is available).
https://www.telegraph.co.uk/news/2020/06/17/what-coronavirus-antibody-tests-home-buy/