Can you believe this is happening?

Just in time for the summer travel season, the world has turned upside down again

If I told you last year that there would be a fourth COVID-19 wave in 2021, would you have believed me? 

Or that, even in the face of another surge, travelers would throw caution to the wind, sometimes literally? Or that vaccine certifications would become a political hot button?

No, you would have probably said. Not in this version of reality.

And that's …