Comparing SD to NYC is apples to oranges because of population density. They probably don’t have many cases of this in the rural areas of China either.
The same reason Houston as a lot of cases and Lubbock almost none.
It’s why I compare NYC with HK similar cities.
NYC —— Subways. HK -— MTR
NYC —— Filthy HK -— Powerwashes the streets
NYC -— Mayor said, “Hug a Chinese” HK-— closed border with China
I compared New York to Hong Kong.
New York has had compulsory masks for months and they still ended up with the highest infection and death rates on the planet.
Your “anecdotal” example from Hong Kong doesn't work.
I used South Dakota because they had no lockdowns, no compulsory masks or social distancing and still ended up better than almost ever where else.
Plus they didn't destroy their economy like New York.
There is zero proof that masks work. They don't.