[dfxm12]

According to the OED[0], "treatable" is a boolean that means "able to be cured". "Very" is superfluous here - something is able to be cured or not, I'm not sure what room there is for degree. As far as I know, there is no cure for HIV (but I'd be happy to learn otherwise).

So unless "very treatable" is medical jargon with a different meaning from the how the laity use it, calling HIV "very treatable" does seem to be a stretch.

0 - https://en.oxforddictionaries.com/definition/treatable

[dajohnson89]

In the medical world, treatable is very different from curable.

Chlamydia is a curable bacteria infection (antibiotics). There is no known cure for HIV.