Kristian G. AndersenGeverifieerd account

I agree but we don’t know yet so I think it’s wrong to say protective immunity doesn’t last. What is protection even? Sterilizing immunity? If re-infection means the sniffles for 99% of people, is that protection?

Well, since the immunology focus at the moment is primarily on neutralizing antibodies, I assume alexactly that - neutralizing. Which translates into steralizing because it should not allow for productive infection.

How would you know if survivors have sterilizing immunity, or simply protected from disease without massive longitudinal PCR testing? They’re clinically indistinguishable.

Clinically - yes, biologically - no

nAbs is one thing, immunity something else - and for COVID-19, we just don't understand immunity. All these studies are focusing too much on nAbs and too little on e.g., role of T-cells and non-neuts. Yes, I'd like to see long-lasting nAbs, but we don't know if they're required.

I completely agree.

The worst interpretations of these papers conclude that "immunity doesn't exist in most people" (because, lack of neuts). If that was the case, we'd see report after report about reinfections by now - and we don't. So it works, but how long is an open Q (and it's more than neuts)

Another limitation of these nAb studies is a lack of consistency in time of sampling. I think Florian showed that if you wait, a lot of people with low or no nAbs will end up seroconverting. The point about a lack of re-infections is huge and seems to be widely ignored.