Fwiw, I've found infrared induced hyperthermia to be extremely useful, but it's gruelling, time consuming and has a very short period of effect. I've been performing it most days for ~12 months.

"...nine cycles of whole-body hyperthermia (target body core temperature, 38.5 degrees C; duration, 50 min)... caused a significant reduction of all cytokines by 40-50%"

https://www.ncbi.nlm.nih.gov/pubmed/19089489

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6263304/

I started the protocol outlined in Dr. Ely's paper recently. It seems to have reduced my symptoms somewhat, but it's too early to tell for sure.