[dehrmann]

> demographically similar

Not really. Santa Clara county has San Jose, a city of 1M. San Mateo's largest city is Daly City (100k). San Mateo county also has a more rural and isolated coast. San Mateo county is also a lot whiter.

[gnicholas]

Comparisons are never perfect, but we will surely be able to learn from seeing what happens. Also, it's not as if the only data that will come in will be at the county level. Menlo Park and Palo Alto are virtually identical from a demographic perspective and will be following different rules. We'll be able to see how their reported numbers differ. For example, we'll be able to track the case counts in MP and PA school districts.