People keep saying that lockdown and elimination strategies only work on islands, but I've yet to hear a compelling narrative why that should be the case. The

People keep saying that lockdown and elimination strategies only work on islands, but I've yet to hear a compelling narrative why that should be the case. The only variations in the effectiveness of a lockdown strategy should be due to - Household size - Compliance levels - Duration Covered population, and population density should be completely irrelevant. You also need a seperate and ongoing strategy to prevent re-introduction, and an outbreak management strategy, but those are seperate concerns. Ideally, if your neighbouring countries/states/whatever were similarly effective, then re-introduction management shouldn't be too difficult (cf 'pacific travel bubble', etc).