The way we travel in the brave, new, post-pandemic world continues to change and evolve.

The COVID-19 effects on the airline industry, whose businesses suffered monumental losses over the past year, have spurred changes in how airlines protect their customers.

Among the more public-facing adjustments is the idea of health passports – proof that international air travelers are healthy before boarding.

According to a story at simpleflying.com, Delta Air Lines now has a testing partnership for customers to order an at-home test, and passengers flying to the U.S. will be able to upload their negative test results online at check-in, which will clear them for entry.

Delta announced a partnership with TrustAssure for customers to upload and verify their documents at check-in directly.

And Delta isn’t alone on this trend.

American Airlines expanded the eligibility of its digital health passport, VeriFLY, to all airports; and Alaska Airlines announced it would be implementing the VeriFLY health passport.

Overseas, British Airways said it was using VeriFLY for all inbound UK flights.

Digital health passports work the way passports do, except instead of physical copies of negative test results, it’s all done on the app.

Some tests can cost up to $119, and most results take up to 36 hours to come back. One test, via saliva collection, fulfills requirements to enter locations such as Hawaii, though passengers should double-check the test meets entry requirements before purchasing one.

It can all become confusing, but there’s an app for that, too.

Delta has an interactive tool with updated information on test requirements, quarantine restrictions and more to give customers a representative picture of what they’ll need before entry.

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