I don’t know about other Rez’s. The Dine[h] Rez is the only one I pay attention to.
I just don’t understand what the source(s) would be. Some are mobile a lot—might explain it. But it cropped up very early in all this. Curious, still. They seem to have pretty decent medical care at gov funded hospitals on the Rez. I haven’t checked to see how crowded they might be.
The map seems to show the largest number of cases as being between Window Rock & Flagstaff—if that’s an accurate representation. That’s fairly near the freeway corridor which might be part of an explanation.
Thanks for more info. Yeah, if you grew up in high country, you got acclimated. I grew up barely above sea level.