Welcome to HealingWell and the CFS forum!
To my knowledge, no one has ever been cured of CFS. But until a cause or definitive diagnostic test is discovered or developed, we can't really know for sure. It is true though, that people get better. It tends to be the people who are less severely ill, and for shorter amounts of time, who tend to have significant improvements. And people who are very seriously ill, or for many years, tend not to get much better, or if they do, they only get a little bit better.
I read a research study somewhere, that said how many years and how seriously sick with CFS, and how much better they could get. I don't remember the details, but just in general, it said being mildly sick for up to 2 or 3 years, patients most likely can improve almost completely. And the more seriously they are are sick, the less they improve. And then those who are sick for 6 to 8 years, or more, have the least chance of improving. They might improve a little, but not much. And the worst they are sick, the less they can improve.
And I should probably remind folks that I'm not a professional of any kind. This info is just the best I can remember of a researach study that I read about.
Also, the way most people get better is just to read as much as they can about CFS. They pay close attention to what their own body is telling them, as this is a highly individualized illness. What treatment works for you might not, probably doesn't work for someone else, and what works for someone else, might not work for you. So be guided by your own worst symptoms. Focus on learning what might be causing your worst symptoms, and learn what can be done about it. Then try one thing after the other, until you hit on something that works. Then start on your next worse symptom.
My advise would be if one has only been sick less than 3 years, to put everything else aside right now. Make healing and getting better your only goal for right now. Because you do have the potential to get better. It seems that after 5 years or so, one loses the potential to improve, although that is just my own observation. Then if you do get well, it seems to be fairly permanent. CFS is an illness of relapses and remissions, so you will always be fluctuating -- several months better, several months worse. Or if you really manage to improve a lot, you may have years where you're better, and years when you're worse. But it is possible, in the beginning of the illness, to improve to the point where your relapses never get as bad as in the beginning, and your remissions are much longer.
The other factor to remember, is that sometimes people get so sick that no matter how hard they try, they can't get even a little bit better. So if that happens, don't blame yourself. Just keep doing whatever you can to feel better, but there are cases which are very stubborn, and it's just out of anyone's hands to improve, and also no one's fault.
I SO wish I had better information to share with you. This is a very sad and tragic illness. But research is ongoing! A lot has been learned, and there is plenty of reason to have hope. Take every opportunity to advocate for ourselves -- write your government representatives, I can provide a lot of advocacy info, if anyone is interested.
Best of luck with this. Please feel free to discuss anything here, which you might find helpful or interesting. Take good care