My wife is a nurse that was listening to a symposium put on by some leaders in the health industry. Modern medicine right now doesn't have solid answers to cure Covid 19 except isolate yourself and let your body's defense system do the healing. Since we don't have pills to cure it, they were looking at methods used back in the pandemic of 1918 to see if any of those might apply today. Before antibiotics people used to try and raise their body temperature to kill the bugs. (Yes I know antibiotics don't work on viruses). I remember my mother who was a nurse in the 30's telling about giving patients a hot/cold treatment in the hospital. I vaguely remember something about hot towels. Anyway, this could be done in a sauna or hot tub? I don't know anything about hot tubs. I remember reading a story years ago about some kid in Europe in the 1800s that was sick and they put him in a baking oven to raise his body temperature as a way for his body to speed up his healing.
There is also this heating pad called a Thermaphore that is still being sold. It is marketed as a treatment for back pain or sore muscles. Anyway what people used to do many years ago if they got the flu or a cold was lay down in a bed with this heating pad on top of their chest with another layer of blankets on top of that. I think you are also supposed to put your feel in hot water too. While you are laying there baking in bed you are supposed to keep a cool washcloth on your forehead to reduce the heating misery. After 30 minutes then the blankets come off and the chest area is rubbed with a cool cloth. I don't remember the reason for the cold after the hot.
Well these health professionals were saying in this symposium that they didn't know if it would work well with the coronavirus. It did have some impact 100 years ago with the Spanish flu and it is possible it might today. Their point was that trying this this treatment wouldn't hurt but might really help. By bringing the suggestion to a wider audience, it might be possible to get a volume of scientific data on whether it would work.
My wife figured it might be worth a shot if we got sick so she ordered a large size Thermaphore from Walmart for $70. They are made in Indiana. She called up her isolated 90+ year old mom to ask if she remembers these treatments and her mom said sure that was common when she was a girl. Figuring out a way to improve your body's defense system makes sense to me a non-health professional so I'm passing this suggestion on.