As public health begins its swine flu vaccination program - cruise lines are also preparing for any outbreak of flu onboard.
Dr Mark Mason is the chief medical officer aboard the "Crown Princess" which has made regular stops in the city this year -- and -- he says they begin reporting cases when one to one-and-a-half percent of the passengers exhibit flu like symptoms:
Mason says the ship stocks flu vaccine and will step up sanitation levels by increasing the amount of chemicals and cleaning carried out on a regular basis -- he says the strict onboard protocols have actually stopped outbreaks onboard Princess Cruises over the past couple of years.
