How often does someone need to get tested ? You could be corona free for a day and get infected riding the subway the next, and infect the restaurant on the third day you go in with app.
Not a problem.
The testing, described in my original idea, was serological antibody testing
combined with tests for current virus-shedding. (I've added a note, at the end of my original post, to clarify that.)
If you have the antibodies NOW, then you've already had the virus. That means you either...
(a.) have an
active case now (in which case you'll be shedding and able to infect others); or,
(b.) you have
already recovered and are
immune to reinfection (at least for normal-load exposures, and at least for a few years)
The "green checkmark" for letting you into a bar, or wherever, should require 3 tests:
Test 1: You test positive for antibodies
Test 2: You test negative for shedding
Test 3: You retest negative for shedding, a week later
Under those circumstances you're golden. You've had it, you're not infectious, and you're immune enough to not get it again riding the subway. *
Does that answer your objection adequately,
@toneseeker911?
* Of course there'll be a 1-in-50,000 chance that you do get it on the subway because some super-spreader breaks the law, sneaks onto the subway without anybody checking his QR code, and sneezes in your face twice, thus overwhelming your existing antibodies with an overwhelming viral load. But such extreme circumstances, if they ever happen, won't happen often enough to outweigh the advantages of getting immune people back out into the economy.
NOTE: Most coronavirus antibodies provide immunity against reinfection by the same or similar viruses for at least a few years. But we don't know exactly how long the immunity lasts...
yet. But by this time next year, we'll start to get predictions of how long antibody protection will last.
Therefore, I also recommend that the test-results provided by your doctor be
time stamped. They should have an
expiration date; after which you'd have to get retested.
But I expect that won't actually be needed. After all, by this time two years from now, every member of the human race will have had exposure and developed some small amount of antibodies (unless they died, or a vaccine came out, or they were deemed high risk and set up to live in permanent quarantine). SARS-CoV-2 is, after all,
that infectious, and we're not going to stay in
permanent isolation, no matter what. (Doing so would, through poverty and civilizational collapse, kill many more people than COVID-19 ever will.)