[vorpalhex]

> Single episodes of psychosis can in many cases be prevented from developing into schizophrenia

Your source does not say that.

> Some people who receive early treatment never have another psychotic episode.

That actual number of some (and not "many", "most" or even "meaningful proportion") is not defined in the page or underlying study.

Broader studies seem to suggest some people regardless of treatment only have an isolated episode. It is not clear the RAISE intervention itself changes that proportion.