Three quarters of Singapore's Covid-19 infections in the last four weeks were among vaccinated individuals, government data shows, as a rapid ramp-up in the city state's inoculations leaves fewer people unvaccinated, reports Reuters.

Singapore has already inoculated nearly 75 per cent of its 5.7 million people, the world's second highest after the United Arab Emirates, a Reuters tracker shows, and half its population is fully vaccinated.

It reported 1,096 locally transmitted cases in the last 28 days, of which 484, or 44pc, were fully vaccinated people, while 30pc were partially vaccinated and the remaining 25pc were unvaccinated. There were only seven severe cases requiring oxygen support and six of them were unvaccinated and one was partially vaccinated, the health ministry said.

"There is continuing evidence that vaccination helps to prevent serious disease when one gets infected," the ministry said, adding all of the fully vaccinated and infected people showed no symptoms or mild symptoms.