Nevertheless - they could have shown a bit more mettle and responsibility and said something like: It is too early to be sure whether recovered Covid-19 patients are protected from repeat infection, and if so how long that protection might last. However, we have begun trials and are co-coordinating an international approach to secure the necessary data to answer this question with preliminary findings due in September 2020.
Or some such. The type of statement WHO put out ,as posted above, really undermines my confidence it that organisation.