If this happens what do people get back?
'Australia swine flu ship isolated
A cruise ship carrying 2,000 passengers has been ordered to stay at sea off the coast of Australia after three crew tested positive for swine flu.
The P&O Pacific Dawn, currently moored off Queensland, will be allowed to dock at a major port on Saturday, cutting short its voyage, officials said.
The order came as health officials confirmed more than 100 Australians now had the A(H1N1) virus.
The ship is not expected to be quarantined.
The Pacific Dawn has been blamed for the recent spike in flu infections in Australia after authorities allowed 2,000 passengers to disembark in Sydney despite a suspected outbreak onboard.
At least 20 passengers were later diagnosed with the virus. Their presence in the community is thought to have added to the rapid spread of the flu in Australia.
Experts have warned that Australia's rapidly rising number of swine flu cases could become an epidemic affecting 25% of the population.
Earlier, Federal Health Minister Nicola Roxon said her government would not hesitate to put the Pacific Dawn cruise ship under quarantine if necessary.
She said the rules applying to cruise ships had been tightened, treating all vessels as potential swine flu sites and keeping passengers aboard until they have been cleared.