Yes, there's a lot that's unknown about this plague. Just today Pfizer said that you may need a booster in 8 months to a year but they didn't say if they're developing one, or how it might work against variants that are certain to pop up between now and then. Nor were Moderna and J&J heard from. This thing is going to be with us for a long time.

Mask sociology here in the High Desert of Arizona: No one masking at the gym I use; everyone masking at the pool and spa my wife and I use; everyone masking at Trader Joe's (which dropped the requirement); most masking at Walmart (which also dropped the requirement); no one masking at the indoor shooting range I use.