Dr. Marion Joppe, a professor in the School of Hospitality, Food and Tourism Management, spoke to CBC News about why there are still so many varying rules on border crossing and travel restriction.

Joppe said a return to a freer level of international air travel likely won’t be possible until there’s greater agreement among nations about the COVID-19 tests and vaccination documentation needed to travel.

She added she believes the system will work out how to allow more air travel for business and pleasure.

“People want to travel,” she said.

Joppe researches the economic, social and environmental impacts of tourism.