The malaria cure

Here's a rather fascinating story from medical history:  for a couple of decades in the first half of the 20th century, deliberately infecting poor sufferers of neurosyphilis with malaria was actually a reputable and (it seems) pretty widespread treatment.  The fever seemed to help quite a few recover enough to leave asylums, although that article notes that there was little in the way of detailed follow up. 

And the problem of neurosyphilis was a major one:

Many patients were involuntarily institutionalized in epidemic numbers: in the early 20th century, neurosyphilis was responsible for 5 to 10% of all psychiatric admissions.

I don't think I have ever heard of this treatment before.