How will zero-covid countries safely reopen their borders?

As plans are made for international travel to resume, covid-free countries may have to achieve herd immunity through vaccination before letting the rest of the world in

Več na: https://www.newscientist.com/article/2270246-how-will-zero-covid-countries-safely-reopen-their-borders/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=news

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