Singapore is discussing the mutual recognition of vaccine certificates with other countries, Prime Minister Lee Hsien Loong said, calling it a necessary step towards resuming global travel.
Singapore, a regional travel and tourism hub, has been rolling out its COVID-19 vaccination programme over the last two months.
It has approved shots from Pfizer-BioNTech and Moderna.
"Even if each of us gears up to secure our own supplies, we must cooperate internationally so that all countries including developing ones have access to vaccines for their people," Lee said in a video recording posted on Facebook on Wednesday.
"We are also discussing mutual recognition of vaccine certification with interested countries," he said without specifying the countries.
Singapore's economy, which recorded its worst recession in 2020 due to the pandemic, is staging an uneven recovery this year and a return of more business and tourism travel would be a boost for the city state.
Greece, Spain and Britain are among other nations looking into the idea of vaccine certificates or so-called vaccine passports in a bid to revive economies and travel.
Australia said on Saturday it would double the maximum penalty it can impose on tech firms found to have failed to uphold a ground-breaking social media ban for children, as evidence mounts that the ban has had little effect on teen use.
A strong earthquake struck Afghanistan's Hindu Kush region on Saturday, the European Mediterranean Seismological Centre said, sending out tremors that could be felt from the capital Kabul across the border into neighbouring Pakistan.
Serbia's populist president Aleksandar Vucic, under pressure after months of anti-government protests, said on Saturday he will resign within weeks and the country will hold early presidential and parliamentary elections.
The death toll from Venezuela's devastating twin earthquakes rose above 1,400 on Saturday as foreign rescue teams poured into the country and authorities pressed on with the search for survivors in the hardest-hit coastal areas.
A light aircraft crash into Beijing's tallest building on Friday killed the pilot and injured 13 people who were not on board, the local government said following the unusual accident for the Chinese capital, where airspace is heavily restricted.