"Cure" is a loaded word.
If we take "cure" to mean a permanent elimination of causative agent of illness, then there are very, very few cures out there.
But there are a great many controls out there. Much of modern medicine is taken up with means by which symptoms of illness can be mitigated, or better yet, their manifestation suppressed.
Can a person with diabetes be cured? Not yet. But we have many strategies to make diminished pancreatic function more effective, or to replace it altogether. Insulin injections aren't a cure, but they counteract the impact of the disorder.
Is an HIV+ person with an undetectable viral load cured? No, of course not. But the person's therapy seeks to ensure that the virus can never proliferate to such an extent that their immune system is threatened. A pretty good result.
Can autism be cured? Of course not. But in some cases, a person with an ASD can develop skills that will reduce the clinical significance of their symptoms. Perhaps not all the time, and perhaps not consistently. But enough so that the ASD no longer presents a significant impact on daily living. And even trickier, what works for one person does not necessarily work for any other.
But since we can't cure it, let's not be to quick to dismiss the idea that it is possible--at least in some cases--to make it as easy to live with as possible.
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--James