With the global economy showing signs of recovery, countries eager to revive their tourism industries and people desperate to reunite with family and friends, it won't be long before we'll have to acquaint ourselves with a new type of travel document - the vaccine passport.
As Britain prepares to exit its national coronavirus lockdown in time for summer, Downing Street is forging ahead with its plans to resume international travel from May 17.
Starting next week, the app for Britain's National Health Service will include a feature that shows a user's vaccination status, functioning effectively as a vaccine passport. Less tech-savvy individuals will be given paper certificates instead.
The new system intends to serve as proof of vaccination for British travelers and hypothetically speeds up their entry process.
If the initiative is successful, it could pave the way for other countries looking to form summer travel bubbles.
Britons can vacation in a "green list" of countries that include Australia, Singapore, Portugal and Israel, among others, without having to quarantine upon returning. The catch, of course, is that many of those nations have their own set of quarantine rules for foreign arrivals.
Nevertheless, one thing is for sure: Britain's aggressive vaccine rollout and subsequent reopening of borders have ensured it a quick economic recovery.
Meanwhile, Hong Kong grapples with vaccine skepticism and lags far behind.