Singapore has said it has opened up its Covid-19 immunisation drive to a younger age group after more than half of its elderly population signed up for or received their vaccinations.

Residents aged 45 to 59 years can now register to receive vaccines, of which 1.1 million doses have so far been administered in Singapore, with 310,000 people having completed the full regimen, health minister Gan Kim Yong said, according to Reuters.

The trade and tourism reliant nation of 5.7m people, a regional business centre, has recorded no new locally-transmitted coronavirus cases in the past two weeks and has managed to quickly control most of its outbreaks.