The tiny Pacific nation of Nauru has congratulated itself on a “world record” Covid-19 vaccination drive which resulted in all its adult population receiving their first shot.

The remote island nation is one of the few places in the world to remain virus-free and has now also become one of the first to give at least one shot to all adults, AFP reports.

Authorities in Palau, another far-flung island nation in the Pacific, say they are on the verge of a similar feat, with 97 per cent of adults receiving their first jabs.

The Nauru government said its four-week campaign exceeded expectations as vaccination centres stayed open for extended hours to ensure maximum access.