SYDNEY, AUSTRALIA - JUNE 01: P&O Cruises ship 'Pacific Dawn' arrives back in Sydney after cutting short her Great Barrier Reef voyage following a Swine Flu scare on board, at Darling harbour on June 1, 2009 in Sydney, Australia. The 2,000 passengers left aboard were all allowed to leave the ship after they were given the all clear following an outbreak onboard, where three crew tested positive for the virus. The Queensland Government was forced to declare a public health emergency on Saturday in order that the vessel be allowed to dock in Brisbane, where 84 passengers disembarked having been screened for the Swine Flu virus, with all required to quarantine themselves for seven days. The ship is due to sail again on Thursday, reportedly fully booked, as Australia now confirms 303 cases of human swine flu.