Slightly OT:
A kid once told me that when he was about 8 he went to visit his grandparents, who live in the desert. He played outside, alone, for awhile. When he returned, he had an odd mark on his arm.
His grandparents told him it needed immediate attention, and brought him to the hospital.
The guard who inspected their car at the hospital parking, told them not to leave the car and to keep the windows up. Within a few minutes, several men in "Corona suits" escorted them all into a closed room, and left them for a few hours.
The docs then came and told the child and his grandad, that the marks looked liked the bubonic plague, and so they immediately quarantined them. The fact that they are both alive and healthy three hours later, implies that it is something else, so they will now get regular treatment.
I have no way of verifying the story but I imagine it is true (though perhaps not recalled 100%, he was 8 at the time).
It reminded me just how close we really could be to having another worldwide plague.
If you are talking about the desert of the American Southwest, sounds like a tale (whether real or made up) about hantavirus.