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Some countries have had no community (local) infections for long periods but if you allow international travel then you always run the risk of importing cases.
"As much of the world struggles to contain new waves of the Covid-19 pandemic, Taiwan just marked its 200th consecutive day without a locally transmitted case of the disease."
Taiwan Covid: How they went 200 days without a locally transmitted case - CNN
New Zealand and Taiwan have done very well generally speaking.
"New Zealand recorded just two new cases of coronavirus on Monday, the nation’s health authorities said, while there are just 52 active cases there. The nation’s successful handling of the pandemic has been attributed to widespread and early testing (1.2 million tests have so far been carried out), clear communication around public health measures and a test-trace-isolate system established early on. New Zealand’s successful response in dealing with the virus comes even despite the country reporting their first case around February 28, more than one month after the U.S. reported its first travel-related case on January 21."
New Zealand, With Its Covid-19 Outbreak Under Control, Is In Talks With Biden As U.S. Exceeds 12 Million Cases
"Taiwan has registered just 607 coronavirus cases this year and seven related deaths, according to the Taiwan Centers for Disease Control. Florida has a slightly smaller population (21.5 million) but has recorded more than 897,000 cases and 17,600 deaths, according to Johns Hopkins University COVID-19 tracker."
No lockdowns, no downturn: Taiwan attracts skilled expats with (mostly) COVID-19-free life
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