Global Cooperation

How could new zealand ind australia have taken so long to figure this out? How is it that world leaders could think that there was some way that new zealand would shut itself off from the rest of the world forever when it came to cove? I mean, it doesn't make any sense to me. But i hope that this will be a lesson for the world, that no country will be safe until the whole world is safe. And once the world has learned that lesson for covid, maybe this is my hope, and we will realize that we americans cannot reduce carbon diox ide levels just over the united states. The atmosphere is mixed, just as microbes are mixed