In the specific case of Taiwan, the only sane strategy (which they are doing) is to require all newcomers to undergo a two-week quarantine.
Incoming visitors have a strong incentive to avoid quarantine. It is difficult for the Taiwanese government to confirm whether someone from the United States or another country has been vaccinated. Allowing visitors who claim to have been vaccinated enter the country without quarantine guarantees a COVID outbreak. Taiwan has COVID under control. Taiwan has few citizens vaccinated. A COVID outbreak in Taiwan would be a national disaster.
A mandatory quarantine may not make sense for Canada on consequentialist grounds since COVID has long since gotten out-of-control there. But the general principle of a mandatory quarantine is sound.
In the specific case of Taiwan, the only sane strategy (which they are doing) is to require all newcomers to undergo a two-week quarantine.
Incoming visitors have a strong incentive to avoid quarantine. It is difficult for the Taiwanese government to confirm whether someone from the United States or another country has been vaccinated. Allowing visitors who claim to have been vaccinated enter the country without quarantine guarantees a COVID outbreak. Taiwan has COVID under control. Taiwan has few citizens vaccinated. A COVID outbreak in Taiwan would be a national disaster.
A mandatory quarantine may not make sense for Canada on consequentialist grounds since COVID has long since gotten out-of-control there. But the general principle of a mandatory quarantine is sound.