Sliversea, Royal Caribbean's luxury cruise brand, however, specializes in expedition cruise experiences. Its ships are smaller than the behemoths sailing the Caribbean, Alaska and Europe, which enables the luxury line to offer unique itineraries.

According to the CDC, the sick travelers' symptoms included diarrhea, abdominal cramps, headache and muscle aches

Royal Caribbean's next new cruise ship, Star of the Seas, touched water for the first time when the vessel was floated out at the shipyard. Star of the

Among 2,172 passengers on the line’s Radiance of the Seas ship, 180 reported being ill along with three crew members.