For anyone who is interested, there is currently a
Post# of 22453
https://www3.nhk.or.jp/nhkworld/en/ondemand/video/2050141
If you had symptoms of long COVID, but the test device result came back as negative, what would you do? I would be inclined to undergo a safe and effective, drug free treatment regardless of test result.
Does this mean such a test device would be pointless? Maybe. But treatments such as shown in the video may not be 100% effective to everyone. Test device might also be able to flag certain health indicators where other interventions might be of some benefit.