Oceania Rugby cancelled the match after a member of the Tongan team reported suspected symptoms of measles to the organisation and the Fiji Ministry of Health and Medical Services.

The match, which was scheduled to be played on Monday, will be declared a draw with both teams awarded two points.

Leonard has backed the officials' decision to prioritise player welfare and says the Australian A side are focused on gaining back points in their remaining matches.

"It was really disappointing to find out we wouldn't be playing but it's good to know players' welfare is the highest priority," Leonard said.

"Medical staff are all over the situation to ensure everyone is safe and able to play as much of the tournament as possible. They're taking precautions and doing necessary tests to ensure the scenario is clear and if quarantine is needed, it will happen as well.

"We're trying not to focus on that side of it, we're just focused on our preparation and planning as if the games are going ahead as scheduled.

"On the upside, it gives us the rest of the week to build on our structure and weed out any issues we've got, so we're ready to face New Zealand on Friday."

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Australia A, who are coached by Moana Virtue, are still scheduled to face a Black Ferns development side and Samoa over the next week in Lautoka.

The tournament doubles as a qualification round for the 2021 Rugby World Cup, but Australia will use the event to build further depth in their squad having already qualified.

Leonard, who made her Wallaroos debut earlier this year, is one of four Brumbies players in the development side, joining Grace Kemp, Remi Wilton and Samantha Wood.

"The amount of growth and learning you have from these opportunities is incredible," Leonard said.

"It gives girls who have only played a few tests or have never been part of international rugby an opportunity to see the standard and level of play that's expected.

"It's really important to not only develop the girls who have already played [for Australia] but also build depth in the whole squad for the years to come, especially looking forward to the 2021 World Cup."

The 24-year-old only started playing rugby last year after being convinced to attend Brumbies trials for the inaugural Super W season.

She hopes to continue her rapid rise up the ranks and has her sights set on the Rugby World Cup to be held in New Zealand.

"It's definitely a goal looking forward but I'm focusing on the goals in the nearer future for now," Leonard said.

"I really want to perform well in this tournament and I'm looking forward to next year's Super W, where I'm hoping we can shuffle the NSW-Queensland setting as it is now.

"But I'm definitely hoping to be involved in the Wallaroos campaign again next year and the 2021 World Cup, being out there and representing our country across the series."

The Brumbies have recently started their Super W preparations, with the competition set to kick off in February.