Fiji holiday

Australia's High Commissioner to Fiji, John Feakes, said Australians are travelling to Fiji because of its high vaccination rate

"You'll see thousands of Australians will be coming in. You see the bookings are astronomical so I'm very confident that Australians will be spending time here, before Christmas, after Christmas and way into next year."

He said Fiji remains the most desired holiday destination in the world for Australians.

Another four flights from Australia are landing in Fiji today and Jonathan Feakes said the bookings are astronomical.

The couple died while on a holiday in Nadi last month and infectious diseases have been ruled out as the cause of death.

Michelle's father Marc Canalog told the Fiji Times he was informed by officials from the US Center for Disease Control and Prevention (CDC) that investigators were focusing on the toxic chemical paraquat.

Paraquat is a herbicide widely used in Fiji.

Organisations involved and supporting the Ministry of Health in the investigation include the CDC and the World Health Organisation.