Agreed. Poor quality article with little of value to convey beyond those three words, buffed out to the size required of the format.
The answer to the question is "we don't know, it's complicated". It's not a screenplay we're in, reality is messy.
> It's unclear whether people who recover from COVID-19 will be immune to reinfection from the coronavirus and, if so, how long that immunity will last.
There are abstracts of scientific papers that are not as upfront about their results as the first sentence of this article is.