Australia is confident all of its athletes will be vaccinated against COVID-19 before they head off to the Tokyo Olympics, Chef de Mission Ian Chesterman said at the unveiling of the uniforms for the games on Wednesday.

Vaccination is not a prerequisite for athletes competing in the delayed Olympics but Chesterman said it was "common sense" to add a "layer of safety" around the delegation and ensure they did not bring the virus home with them.

"We are very confident that we'll be vaccinated before we go, I think that's the will of the Australian government that we do," he told Reuters.