There have been at least two cases of a second infection, and that's information from a week ago. I don't know what the consensus is, but immunity is not something we should count on.
These are the same two cases that people have been mentioning for weeks, which have been reported in a chaotic period at the beginning of an outbreak. All other signs point to immunity for at least a couple of months, likely even longer.
> more than 80k confirmed cases world wide, and two with a secondary infection.
We should talk about the test error intervals.
With that small amount of secondary cases, maybe it was a false positive the first time. No procedure is 100% failsafe and this is a price that we pay for being in the real world. Maybe the test was not applied correctly, was not stored accurately or was triggered by some artifact.