March 18: The Ruby Princess issues an urgent mayday call for an ambulance for two of its passengers presenting with coronavirus-like symptoms 24 hours before the ship is allowed to dock in Sydney.
March 19: The Ruby Princess arrives in Sydney Harbour. More than 2,700 guests are allowed to disembark without adequate health checks.
March 25: Australian Border Force Commissioner Michael Outram says New South Wales Health is responsible for letting coronavirus patients disembark the ship.
March 29: Several crew members are evacuated and taken to hospital after being diagnosed with coronavirus.
April 2: A 66-year-old crew member is taken off the Ruby Princess for medical treatment. More than 200 crew members are sick and in self-isolation.
NSW Premier Gladys Berejiklian defends the actions of NSW Health and the Australian Border Force and points the finger at the Ruby Princess. She claims staff onboard may have misled NSW Health about the extent of illnesses in passengers.
April 3: Home Affairs Minister Peter Dutton alleges Ruby Princess' operators weren't transparent about the health of crew: 'It was 'clear that some of the companies have been lying about the health of passengers and crew on board'.
April 4: Leaked emails show NSW Health knew of the coronavirus risk on board the Ruby Princess before allowing its thousands of passengers to disembark.
April 5: A criminal investigation is launched into how passengers were able to disembark without health checks
April 8: A team of 30 detectives from state crime, counter terrorism and marine area command start investigating the handling of the Ruby Princess coronavirus scandal. The first briefing into the investigation is held.
April 9: NSW Police clad in PPE equipment raid the vessel, questioning its captain and searching for evidence in a rapid escalation of the criminal investigation.
April 11: NSW Health confirms that at least 46 crew members of the Ruby Princess cruise ship have contracted COVID-19
April 13: NSW Police Commissioner Mick Fuller says patient zero on board may have been a crew member serving meals to hundreds of passengers
April 15: NSW premier Gladys Berejiklian announces an independent special commission to investigate the Ruby Princess fiasco
April 23: With 500 crew left on board, the Ruby Princess left Australian waters to sail to Manila in the Phillipines