Mandatory masking should help, but only a teensy little bit.
No1 place to catch covid is in the family home, if people wear masks it should be including at home. Often outbreak studies are 3 or more so to exclude the family home.
Do people wear masks while eating and drinking indoors, a classic covid19 study was the chinese restaurant study where multiple patrons caught covid19, they would have been wearing masks going to and from the restaurant, but not while eating, which was when they most at risk.
I could go on, air replacment in a room may be measured like 5 to 10 minutes, perhaps more if frugally sealed, vs outdoors where air is moving at 0-20 m/s. Dilution is so much more powerful than filtration.
Coronavirus: UAE suspends flights from Pakistan, special COVID-19 test lab planned. Juat because mask wearing is normalised doesnt sufficiently protect, Culturally having their populace wear face covering is not complicated, yet why the high rates? For one thing, being in a long flight in a tin can with contagious people doesn't help, even with face covering.