8. Carnival Cruises
Not only is Carnival one of the most popular cruise lines in the world, it is in fact the largest, based on passengers carried annually, annual revenue and total number of ships in fleet. The 24 ship fleet based in Doral, Florida, operates the majority of cruises in the Mexico/Caribbean region. Surprisingly, over the last five years, Carnival has only reported five cases of a gastrointestinal outbreak, an estimated 500 passengers were infected over time. This is especially remarkable because the average Carnival cruise liner can accommodate up to 3,000 passengers. There were no outbreaks recorded for 2014 or 2015.
