Vietnam got it under control quite well despite a land border with China. Key to success likely were: - a population that had experience with prior pandemics a

Vietnam got it under control quite well despite a land border with China. Key to success likely were: - a population that had experience with prior pandemics and was thus willing to play along - a strong centralized government (this is a guess, and I'm not just talking about the power, but specifically the centralization - other nations that have states/provinces each implementing their own policies showed the dangers of that approach, e.g. USA, Switzerland, Germany) - extremely aggressive contact tracing and enforced quarantine (for high risk cases, they were put in hotels or barracks, not told "please stay home"). Not just contacts but also contacts-of-contacts (the latter were only ordered to home quarantine). AFAIK they didn't even have much of a shutdown, because the quarantining was so effective.