These are the cruise ships with the best — and worst — sanitation scores so far this year (2024)

For the agency to report a cruise-ship outbreak, 3% or more of passengers or crew members must report symptoms of gastrointestinal illness, such as vomiting and diarrhea, to the ship's medical staff. During the most recent outbreak, a 14-day cruise aboard the Viking Neptune in June, slightly over 13% of passengers (110 of 838) reported being ill with predominant symptoms of abdominal cramps, vomiting, and diarrhea, according to the CDC.

The nasty stomach bug isn't just a cruise-ship problem, though. Norovirus cases have spiked across the United States this year, which some experts say is the result of ending COVID-19 restrictions.

"People often associate cruise ships with acute gastrointestinal illnesses such as norovirus, but acute gastrointestinal illness is relatively infrequent on cruise ships," the CDC says on its website. "Health officials track illness on cruise ships. So outbreaks are found and reported more quickly on a cruise ship than on land."

To try to help prevent the spread of stomach viruses at sea, the CDC randomly inspects cruise ships and scores them on a scale of 0 to 100 through the Vessel Sanitation Program. Inspection scores of 85 and lower are considered "not satisfactory" by the agency.

Most vessels have received scores in the high 90s — only one cruise ship, the MSC Seaside, has failed the CDC's sanitation inspection so far this year. The vessel received an unusually low score of 67, nearly 20 points below the agency's passing grade.

An MSC Cruises representative told Insider at the time that the cruise line had launched an internal investigation based on the inspector's concerns and taken immediate corrective actions.

"MSC Cruises rigorously adheres to health protocols, and the results of this inspection do not reflect the brand's high standards," the person added.

In the past 10 years, only three other cruise ships have received sanitation scores below 70, CDC records show. Violations can include something as small as not posting a raw-eggs advisory on the omelet station or a single fly hovering in a food area. But before going on your next cruise adventure, it doesn't hurt to check out the ship's most recent sanitation rating.

These are the cruise ships with the highest and lowest sanitation scores so far this year:

The 15 cruise ships with perfect scores of 100

The 15 cruise ships with scores below a 95

Correction: July 17, 2023 — An earlier version of this story included a photo caption that misstated how many passengers and crew members aboard the Nieuw Amsterdam reported being ill during a May voyage. It was 284 people, not 539.