The world's most powerful passports for 2021

• Photo: cnn.com

(CNN) - The days of strolling into an airport, flashing a passport, then hopping on a flight to wherever one likes are, for now, a distant memory.

The COVID-19 pandemic has transformed the travel landscape, potentially for decades to come.

Countries all over the world are entering fresh lockdowns, but even when restrictions do lift, it's likely that mandatory vaccination before air travel may soon be a necessity.

The Henley Passport Index, which periodically measures the world's most travel-friendly passports, has just released its latest report – and an analysis of what might lie ahead.

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