The Explorer of the Seas arrived back in port in New Jersey yesterday.

ABC news interviewed some of the sick passengers. Its video below shows one passenger being taken away in an ambulance. ABC calls the incident a "horrific outbreak at sea." 

Incredibly, even though this is the largest gastrointestinal illness outbreaks on a cruise ship in 20 years, the Centers for Disease Control and Prevention (CDC) still has not officially announced what is causing the widespread illnesses.  In addition, the CDC has not declared how the virus came on the ship. It is an impossible task for a single epidemiologist to make such a determination. Without figuring out where and how the virus started, it seems difficult to take steps to eradicate the virus and make certain that the ship is safe to sail on.

The cruise line crew members are busy spraying, wiping and scrubbing. The ship sets sail again tomorrow. I say good luck to the next round of guests.