Locking down the borders completely would just have been impossible. You would be suddendly in need of nurses and doctors. Sometimes, more than 50% of the personal in bordering hospitals are cross-border commuters [2]. Yes, you could discuss on how Switzerland is taking advantage of "cheap" labor from neighboring countries, but it does not change the fact that for Switzerland, closing completely the borders (with 14 days isolation) is just an impossible task.
[1] https://www.bfs.admin.ch/bfs/en/home/statistics/work-income/... [2] https://www.swissinfo.ch/fre/fran%C3%A7ais-et-italiens-dans-...
South Korea, North Korea, Finland, Vietnam, several central American countries and others. Even China fits the bill. Not sure how frequent traffic across Thai borders are, but my impression is that SE Asian countries are not very well integrated.
This country was in this together. For better or for worse. Closing the borders of states was never an option.
I wonder if that's really the case. A year ago I'd say the same for Australia. Yet most Australian states closed their borders at some point as a response to local cases spiking. (I agree it's less practical in the US, but I do wonder about the legality)
How many road cross into CA? How many open fields? You’d need an army of hundreds of thousands to ensure nobody crosses.
Plus, most of the infrastructure is there for the agricultural inspection stations. Just use it to stop human disease instead of plant disease.
And interestingly there are only 16 agricultural stations for all of California. They are only in place at major highways.
https://en.wikipedia.org/wiki/California_Border_Protection_S...
And if I kind of zoom into Google maps I count 36 crossing between the Oregon/California border just between the Pacific ocean and I-5. Sure, a lot of those are probably logging roads and such, but that's just a 60 mile stretch.