A cousin got diagnosed with it recently so I looked at the recent research. I found some interesting bits about the zika virus targeting the same stem cells as glioblastoma - which is why zika causes developmental problems in foetus’ brains. The research is ongoing, and there is little evidence that it works (though there is a paper that looks at the case of a woman infected with zika who was in remission), but honestly the pronostic is so bad that if it was me, I’d fly straight to a zika-infested region, you never know... I think there is one in Thailand.

Search for zika and glioblastoma and you’ll find the papers. Good luck.