AFP/Getty Images
Ronaldo Schemidt/AFP/Getty Images
Mexico has maintained a rather liberal travel policy during the pandemic. This is a general view of the Templo Mayor archaeological area
By Forrest Brown, CNN
The 2021 summer travel season started out full of hope and promise, but by the day, two words are threatening to dismantle it all.
Delta variant.
This more transmissible variation of the coronavirus was first detected in India in February, just when the United States and some other places around the world were starting to really gear up their vaccination efforts. It turned out to be a race against time: vaccines vs. Delta. And just like all other waves of the pandemic, travel feels the Covid impact quick and hard.
Delta variant travel restrictions: Tourists wonder where they can go -- and whether they should
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Delta variant travel restrictions: Tourists wonder where they can go -- and whether they should
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Covid-19 travel restrictions state by state
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