Something I hope to never need; but nice to know if I ever do:
"Princess Achieves Industry First Medical Center Quality Accreditation
While illness or injury is of course unwelcome at any time, the thought of becoming sick while on a cruise vacation may understandably cause some apprehension. But rest assured, at Princess Cruises you are in the safest of hands as our shipboard medical centers hold the unique distinction of being the only medical services in the cruise industry to have achieved accreditation and certification by an internationally recognized health care quality organization.
Following a comprehensive health review encompassing Princess' medical facilities, staff and procedures, Princess Cruises has been awarded Caspe HealthCare Knowledge Systems (CHKS) accreditation and ISO 9001:2008 certification for outstanding quality in health care. CHKS is a major UK based organization which works with public and private health care providers worldwide. These awards recognize the excellent standards of medical care provided onboard our vessels.
Princess' medical centers are staffed by full time maritime medicine specialists who are available 24 hours a day in case of an emergency. Our facilities are equipped to deal with both minor injuries and most major medical conditions.
So, while this may be the one service you don't want to use during your vacation, you can feel secure with Princess Cruises knowing that each ship has a professional, caring, well trained medical staff available to assist you should the need arise."
Source: Captain's Circle Newsletter March 2010