gilesgoat wrote:- they are not sure yet if you can really get immunity with exposure
You do get antibodies to it. They know that. After all, you can't have an antibody test otherwise, right?
And the antibodies are effective against this strain of the virus because, remember, right now, we have no vaccine nor drug treatments for this. When people recover, that's entirely down to their immune system - current treatment for the severely ill is just trying to keep them alive with ventilators long enough for the immune system to hopefully win the battle.
So we know you get antibodies and we know that these antibodies are good for getting rid of the virus. Ergo, to this particular strain, you will obtain immunity.
These bits are known.
What's not known is how robust that immunity is. And the obvious reason why that's not known is simply that no-one in the world has been "recovered" long enough yet for us to have directly seen if these people might get re-infected 6 months or a year later.
Plus, if the virus mutates then, like seasonal flu which does that all the time, last year's antibodies might not be any good for this year's strain. You can keep catching flu every year, because it keeps changing - or, if you want to be more accurate, you can keep catching different strains of the flu every Winter.
And, yes, what Barney said as well, as he's got expertise in this that I don't (save just being interested in it and reading about it), so I didn't even realise that was a thing.
Basically, this is brand new so there are many things we don't know - in many cases, such as the robustness of immunity, because it's not been around long enough to have even happened yet - but, equally, "unknown" doesn't automatically mean "bad".
There's over a hundred thousand "recovered" people in the world now and, so far, there doesn't seem to be a problem yet. Though, of course, that doesn't mean that one won't emerge but, equally, not knowing something doesn't mean that it definitely will either.
Which is the other thing to bear in mind - this is an emerging situation, so when experts say "we don't know", they didn't know back when they said it. But more is becoming known as we go along.
"The half-life of facts" and all that jazz:
"Words ought to be a little wild - for they are assaults of thought on the unthinking."
- John Maynard Keynes