Better not get your hopes up too soon.
First, there are antibodies and there are antibodies.
So some antibodies help you fight off an infection right away, while other antibodies come in only later to recognize and to ward off a new attempt by that germ to invade the holy temple that is your body.
So the first antibody just tells you if the temple had been breached but doesn’t tell you that a 2nd attempt won’t be brutally harsher, although in most cases of viral penetration, it is true that once your body has been invaded, you are far less likely to be successfully invaded again.
If, that is, the virus doesn’t mutate too much and produce “cousins” of itself cuz if a virus does mutate a lot – flu, for example – the presence of any previous antibodies is not much of a deterrent to a new infection, although here again, there are notable exceptions so that some people who came through a severer flu pandemic – Hong Kong flu, par example – seem to be more immune to a cousin of that strain.
They are not more resistant to overall infection but rather some seem more resistant to severe infections from the newer newer cousin of that old virus (and please note, that’s only “some people”; others who came through that previous virus sweep do not seem to be any more resistant at all to newer cousins).
And then, there’s this really key question: If immunity to this new virus does occur through an infection, how long does that immunity last?
A month? 6? 5 years? Forever?
And how effective is that immunity?
Does it, for example, prevent someone from getting severely re-infected yet still allows them to get “”somewhat” re-infected and if they do get “somewhat” re-infected, can they then shed that virus to others?
And perhaps, if they can get re-infected, will that re-infection be easier to diagnose? Harder to spot?
Alas, no one knows the answer to any of this.
So anyone who hopes that antibody testing will miraculously very soon allow us to return to pre-COVID-19 freedoms is still largely dreaming.