Investigation Update on the Serenade of the Seas

Cruise Line: Royal Caribbean Cruise Line

Cruise Ship: Serenade of the Seas

Voyage Dates: 11/18-11/25/06

Number of ill passengers out of total number of passenger: 101 of 2241 (4.51%)

Number of ill crew out of total number of crew: 3 of 848 (0.35%)

Predominant symptoms: diarrhea and vomiting

Actions: Royal Caribbean Cruise Line and the crew aboard the ship took the following actions to respond to the outbreak:

• increased cleaning and disinfection procedures,
• submitted stools specimens for analysis,
• provided daily updates about the illness to VSP until the number of ill people returned to expected levels.
• VSP staff boarded the ship to conduct a targeted environmental health assessment.

The number of ill people returned to expected levels by the voyage that ended on 12/02/06.