Why are people clamouring for Covid tests at all?
They are queueing in droves for many hours or even days for what limited tests can be found available, but any results are of pretty limited use. The accuracy, one way or the other is only 70%, so largely useless! What accuracy there is, is only valid at that exact time, immediately after the test you could be exposed to infection from another person. And what the heck will you do with the information anyway? You'll (probably) still need to go to work and take the kids to school etc. The whole idea seems pointless to me, unless of course you think providing the powers that be with inaccurate information for their records is beneficial.
Also, something to consider. Are you happy with the government having your DNA information?
It is impossible for anything digital to sound analogue, because it isn't analogue!