Although the focus is on what we don't know when examining an area we don't have an answer for it does provide the pieces of information we do have. The article has links to the articles it cites at the end of the article.
Very good article, thanks for posting it, @asp3. This section really caught my attention:
"But scientists don’t know how long a person will be protected from a future bout with the virus. “There’s just been a limited time for people to study this,” she says.
Still, SARS-CoV-2 is not the only coronavirus that infects people. For instance, four others that cause the common cold circulate around the globe. “We can get some evidence from what goes on with some of the human endemic coronaviruses,” says immunologist Brianne Barker of Drew University in Madison, N.J. For those viruses, protection lasts about a year. People can get infected with the same virus over and over again once their immunity wears off, though the severity of a second infection varies. The duration of immunity after an infection with the coronaviruses that cause SARS and MERS is unknown.
To date, there have been a few documented reinfections with SARS-CoV-2, suggesting that, for some, immunity doesn’t last very long. Efforts — including a study Gordon is working on — are under way to figure out how common reinfection really is and whether subsequent infections are any different from the initial one."
