The U.S. Centers for Disease Control and Prevention has announced that an unknown illness sickened several people aboard a cruise ship earlier this month.

More than 140 people aboard Royal Caribbean's Navigator of the Seas suddenly got sick with vomiting and diarrhea during a round-trip cruise from Los Angeles to Mexico. The outbreak affected 134 passengers and seven crew members after the ship departed from LA on July 4.

A dream vacation quickly turned into a nightmare for more than 140 people aboard Royal Caribbean’s Navigator of the Seas when a mysterious illness swept through the ship during a week-long cruise.The gastrointestinal outbreak,