It seems an enticing vision of the near future: air passengers at passport control hold their phones to a scanner that reads a code showing they have been vaccinated against coronavirus. No more on-arrival testing or quarantines. With inoculation programmes gathering pace, so is talk of “vaccination passports” that would help to reopen international travel, and potentially other restricted activities. Though attractive in principle, however, such initiatives need careful handling to avoid pitfalls.
这似乎是会在不久的将来发生的一个诱人场景：在入境检查处，航空旅客将手机放在扫描器前，扫描器读取出显示他们已接种新型冠状病毒肺炎（COVID-19，即2019冠状病毒病）疫苗的代码。不用再进行入境检测或隔离了。随着疫苗接种加快，有关“疫苗接种护照”的讨论也在加速，这种“护照”将有助于重新启动国际旅行，以及其他可能受到限制的活动。然而，尽管这些举措从原理上看颇具吸引力，但仍需谨慎处理，以避免陷阱。
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