All I can say is there "maybe" things that can help. I grew up in a time where we didn't always go to the Doc when we were sick. After all I'm well over 65 and from the South, actually Cajun country.
My Mom and Grandmas had stuff to do if you were sick with respiratory issues. And yes we had different strains of the Flu back then, believe it or not.
They had home-made, handed down treatments, that were used in our family cultures for years. They were found to have some ability to assist with symptoms or complications, and maybe even get over the illness sooner. Did they work, hell I don't know; but my family members survived.
People can call this old wives tales, old folks' medicine, or what ever. But it was common when I grew up. Back then there were not a lot of patented medications (if their were, they were over the counter and made from - yes - herbs, essential oils, and etc), not a lot of doctors, and there was no such thing as the CDC either. Doctors had penicillin, and that was about it. (Although I took rabies shots and polio and small pox vaccines way back then) Even the over the counter stuff was made from natural products back then. Anyone remember Creomulsion? I can even remember boiling Camphor and Sassafrass leaves on the stove and adding Sugar cane. After all I am Cajun, and that grew in the bayou areas.
My Mom and my grandmothers would rub stuff on your chest, have you drink a hot toddy full of who knows what, and have a hot pot boiling with Vicks or Mentholatum (yes the essential oils) to breathe. Dad would but a hot towel or hot water bottle on your chest. Some of these treatments were God-Awful. But I guess we survived, so maybe it helped.
We had no doctors that gave us stuff for high fever (all there was is aspirin back then), or the bad colds and flu back then. Cause they didn't even have stuff for that.
So all I can say is, maybe time to look back to your roots and your heritage. When the Docs say they have no treatment for stuff. Maybe our Moms, grand parents, and great grandparents had already been down that road. They certainly would have done something and not just waited washing their hands.
Sorry, I just had to say all this. And as FDR said, nothing to fear, but fear itself. I get fearful, if I think I'm helpless. But I am far from helpless. Just saying.