Doctors used to prescribe a "change of air" in the 18-19th centuries. Maybe they still should.
Sanitariums
https://en.wikipedia.org/wiki/Sanatorium
I guess the modern descendants are the health retreat, the rural airbnb, and the day spa that offers oxygen therapy.
https://en.wikipedia.org/wiki/Luftkurort
Sanitariums
https://en.wikipedia.org/wiki/Sanatorium
I guess the modern descendants are the health retreat, the rural airbnb, and the day spa that offers oxygen therapy.