South Korea expects to get one million doses of messenger RNA vaccines from the UK later this week.
The vaccine deal was unveiled during summit talks between President Moon Jae-in and his British counterpart Boris Johnson on Monday, on the sidelines of the UN General Assembly.
However, the specifics of the deal have yet to be disclosed.
mRNA vaccines are those made by Pfizer or Moderna.
The UK has fully vaccinated 80 percent of its population aged 16 and over.
"Prime Minister Boris Johnson said that he is very happy about the vaccine exchange, while President Moon says it's an example that shows the friendly ties between South Korea and the UK."
Later, during talks with his Slovenian counterpart Borut Pahor -- Moon expressed hope that the opening of the European country's embassy in South Korea within this year, will be an opportunity to expand bilateral exchanges.
"I hope today's summit, which comes ahead of the 30th anniversary of diplomatic ties next year, becomes a starting point for co-existence and cooperation between the two countries and to head toward a new future."
On the occasion of the summit, the two leaders exchanged state medals -- Slovenia gave the medal to Moon in recognition for his contributions to peace while South Korea gave the medal to Pahor in return for his active support for Korean Peninsula affairs.
Moon also had a 10-minute talk with UN Secretary-General Antonio Guterres -- where he called for continued support for denuclearization and peace on the Korean Peninsula.
"President Moon said this year is meaningful as it marks 30 years since the two Koreas joined the UN, to which the UN Secretary-General said that it will become an important opportunity for the future and peace of the Peninsula."
Moon also promised to continue efforts as a responsible country to respond to climate change and push for sustainable development.
XXX, Arirang News.