Scientists testing HIV cure report 'remarkable' progress
theguardian.com
theguardian.com
Even if this has nothing to do directly with the "cure" this is one of the few documented cases of this happening.
Understanding what happened can lead to a cure even if it was a combination of genetics the process or even something completely different that that person happened to do or take.
Once you understand what was different about that patient you can build a model and test it.
This is the most important part of drug trials and this is how it works you test various doses, combinations and treatment regiments and you figure out what works.
1 out of 50 is a pretty huge deal and it might be an amazing and very lucky break.