All passengers on flight TG999 Bangkok-Melbourne will be asked to take polio vaccinations after the first discovery of polio in Australia in 20 years was confirmed last Friday.

The July 2nd flight of TG999 saw 250 passengers on board, one of which was the 22-year-old Pakistani student carrying the contagious disease.

So far, nearly half of the passengers on the flight have been reached, with just under 60 passengers already taking up the offer of booster shots.

Though the flight landed in Melbourne with the majority of the passengers living in VIC, it is believed that passengers also came from NSW, QLD, TAS and the ACT.

The patient is currently being held in quarantine at the Box Hill Hospital in Melbourne and it is believed that his polio symptoms are now gone - though he will remain at the hospital until two tests for the disease show negative readings.

Still, authorities released a nation-wide health alert, with all hospital emergency departments around the country being warned to be on the look-out for symptoms.

John Horvath, Australia's Chief Medical Officer had earlier made a statement saying that whilst the case was worrying, airline passengers who travelled with the man were in little danger.

Whilst Australia was deemed polio-free in 2000 by the World Health Organisation (WHO), there are still four countries in the world that the WHO has not recognised as being polio-free, one of which is Pakistan.

The other three remaining countries are Afghanistan, India and Nigeria.