> The parent comment was a claim that their 3 year old did not get COVID in a preschool/daycare setting because of widespread mask wearing.

Both yours and theirs can be true. Perhaps preschoolers in Asia have better parental modeling of proper mask wearing, having been a fairly widespread practice in some areas since the first SARS. Perhaps there's a difference in how careful the teachers were to make adjustments when someone's slipped.

In Singapore you almost never saw kids even young as 2 years old not wearing a mask right. My daughter started wearing from 1y7m and it took about 1 week of adjusting it correctly when she would touch her face or mask to her just leaving it alone.

While you see most westerners wearing their mask below their nose, the kids follow suit.

In Taiwan since September last year, enrolled my daughter in school, every kid in her class wears a mask, they get temp check before being allowed into school, teachers help the kids with the masks. So far her class has had 1 kid who got covid, stopped coming to school, got better, that's it. No outbreak.

So good mask wearing starts with the parents. In asia we take covid seriously, other than westerners you rarely ever see locals not wearing masks correctly.