Ok, I had to look up facts:
http://www.city-data.com/county/Marin_County-CA.html 7% rural (compared to 45% in Mendocino), 70% white, high cost of living, 85% vote for Biden, majority religion is "None", population 258k, and 88% fully vaccinated of 12+,
https://coronavirus.marinhhs.org/vaccine/data
240 official deaths 0.09% of population
I believe I can picture it now.
Compare with some random county in Texas (obviously selecting based on rock-bands): Lamar county, TX:
45% rural, 73% white, 13% black, 50k, Trump 78%, 30% fully vaccinated of 12+
168 official deaths 0.3% of population -
https://theparisnews.com/news/covid/
Quite a bit of difference.