As a matter of fact, it's not difficult to determine and prove natural immunity at all. There are several very accurate serology test assays that do exactly that.
What HAS been extremely difficult, however, is actually getting access to the proper test. Here's a pretty good explanation why:
And by the way post # 32 in that thread (by me) details my difficulty in getting that test)
https://freerepublic.com/focus/f-chat/3996481/posts?page=32#32
And another example why (watch the video):
The first problem is understanding what can be tested and which test is appropriate.
(and note: Semi-Quantitative Testing is NOT the one you need, but this outlines the process)
If you get the test from LabCorp, the one you need is SARS-CoV-2 Antibodies Nucleocapsid #164068
You will simply need to have your doctor order this test.
And you already know the "Spike" tests are inadequate, after all, you have the Spike protein vaccine already, and it diidn't work.
For the first step in simply understanding the tests, start here:
What I meant was, as a matter of public health policy, it would be difficult to prove prior infection and recovery TO THE GOVERNMENT and to the PRIVATE ENTERPRISES that mandate some or another action. We have idiots like DeBlasio mayor of NYC trying to turn 105 pound 21 year old hostesses into cops brawling over his moronic “passport” system.
I do agree it is possible to get an antibody test and get the documents to prove it; and should be just as easy to “load it” onto a “passport app” or come with a scannable bar code which was a document I needed when I went to Hawaii last fall (negative test papers). Had to scan it in at the airport when I landed. Passports I believe are roundly rejected by Americans. In Israel though they have a much more tight-knit country and largely centralized medical information which is largely why they can use Infected/Recovered data for their green pass system. In France on the other hand, they have tried to implement the passport, afaik recovered not included as protected, but many people charged with enforcing the rules (waiters in cafes, bars, restaurants etc) just ignore the mandate to ask for proof of vax.