Sad to hear about that unhygenic & dangerous behavior in the fun spot Quartzsite. Something similiar happened to me in Home Depot, and I left the area of that person and went to the cashier area, did not get sick.
For sure the rates of Covid 19 are dropping in AZ but we are not out of the woods. 4 people died of Covid yesterday. You can still save lives by wearing a mask. The infection is spread from one person to another through respiratory droplets, so that is why covering your nose and mouth with a mask saves lives. The droplets get stuck in your mask instead of being breathed in by a nearby person.
For a mask that is easier to breathe through, the Fry's store in Yuma has n95 masks (3 masks for $4) in their pharmacy area. I use this type of mask when I will be around others for more than 15 minutes.
In Yuma city there is an enforceable mask ordinance. The businesses have signs and bouncers at the door for that purpose. During the one mask arrest at Walmart, the person also assaulted the responding officer, so more to it than failing to mask up or leave the premesis. Not sure about LaPaz county.
Also, if you can keep your six feet of distance by backing away it is harder for a person to make contact unless they are yelling or spitting. Just like any bad dude, you are going to back away and save your life. Those face shield things combined with the mask make a pretty good barrier when the worst happens.
Sorry you had to go through this, maki. If you stay in AZ for the heat, you will meet only nice people. All the mean ones leave for 6 months or so when it gets hot.
-crofter