Just days after dealing with a large gastrointestinal illness outbreak, Ruby Princess is once again reporting new sickness cases during its latest Alaska voyage.
While the numbers are far smaller this time, the development shows that cruise lines often remain on high alert even after intensive cleaning procedures have been completed.
The newest illnesses come on the ship’s July 2, 2026 sailing from San Francisco, only days after more than 100 passengers and crew members became sick on the previous voyage.
Although the current situation is nowhere near the level that requires a formal investigation by US health authorities, Princess Cruises is almost certainly continuing enhanced sanitation efforts while monitoring passengers and crew throughout the voyage.
For travelers planning an upcoming cruise, this serves as another reminder that gastrointestinal illnesses can occasionally appear on ships despite strict cleaning standards and health protocols.
Seven New Cases Confirmed on Current Sailing
According to local reports from Alaska, seven people aboard Ruby Princess have developed symptoms of gastrointestinal illness during the current voyage.
The reported cases include:
- 6 crew members
- 1 passenger
All affected individuals were following isolation procedures as of Sunday, July 5, helping reduce the chances of additional transmission onboard.
Compared with the previous sailing, the numbers are dramatically lower.
Still, cruise lines typically respond quickly to even a handful of illness cases because viruses such as norovirus can spread rapidly in shared environments if precautions are not taken early.
Why the CDC Hasn’t Opened a New Investigation
Whenever a cruise ship experiences a significant outbreak of gastrointestinal illness, many travelers expect to see an alert from the US Centers for Disease Control and Prevention (CDC).
That hasn’t happened yet for this sailing—and there’s a simple reason why.
Ruby Princess can carry approximately:
| Onboard Population | Capacity |
|---|---|
| Guests | 3,080 |
| Crew | 1,100 |
| Total | 4,180 |
With only seven reported illnesses, the affected population represents roughly 0.17% of everyone onboard.
Under the CDC’s Vessel Sanitation Program guidelines, cruise lines are required to report outbreaks when gastrointestinal illness affects 3% or more of passengers and crew combined.
Since the current voyage remains well below that threshold, there is currently no requirement for a formal CDC investigation.
That could change if additional illnesses are reported before the cruise ends, but for now the situation remains under monitoring rather than federal investigation.
The Previous Voyage Experienced a Much Larger Outbreak
The current reports come immediately after Ruby Princess completed a sailing that experienced a much more widespread illness event.
During that earlier voyage, officials reported a total of 125 gastrointestinal illness cases, including:
- 102 passengers
- 23 crew members
Because those numbers exceeded the CDC’s reporting threshold, the outbreak was officially reported and documented.
Following the ship’s return to San Francisco, Princess Cruises delayed Ruby Princess’ July 2 departure to allow crews extra time to carry out extensive cleaning and disinfection before welcoming a new group of guests.
Deep-cleaning procedures after outbreaks typically involve disinfecting public spaces, sanitizing high-touch surfaces, replacing certain food-service items, and increasing hygiene measures throughout the vessel.
Cruise Itinerary Continues Without Changes
Despite the new illness reports, the voyage itself has continued largely as planned.
After departing San Francisco on July 2, Ruby Princess maintained its Alaska itinerary without canceling ports or scenic cruising experiences.
The ship has already visited:
- Sitka
- Haines
Passengers are also still scheduled to enjoy:
- Glacier scenic cruising
- Ketchikan
- Prince Rupert
before returning to San Francisco on July 12.
At this stage, there have been no announced itinerary changes related to the illnesses onboard.
Extra Cleaning Likely Remains in Place
Even when illness numbers remain relatively low, cruise lines generally increase health precautions as a preventive measure.
Although Princess Cruises has not publicly outlined every step being taken during the current voyage, enhanced sanitation protocols commonly include:
- More frequent cleaning of elevators, handrails, and public areas.
- Additional disinfection in restaurants and buffet spaces.
- Encouraging passengers to wash their hands before meals.
- Isolating guests or crew members who develop symptoms.
- Increased monitoring by the ship’s medical team.
Cruise industry health experts often point out that early intervention plays a major role in preventing a few isolated cases from becoming a much larger outbreak.
For guests, one of the simplest ways to help protect themselves is by washing their hands frequently with soap and water, particularly before eating and after visiting public areas around the ship.
Why Consecutive Outbreaks Sometimes Happen
Seeing illness reported on back-to-back cruises may sound unusual, but public health experts say it isn’t uncommon.
Norovirus, one of the most frequent causes of gastrointestinal illness on cruise ships, can continue spreading even after someone begins feeling better.
According to guidance from the CDC, infected individuals are generally most contagious while they have symptoms and during the first few days after recovery.
Because crew members remain onboard between voyages, there can occasionally be continued transmission despite extensive cleaning efforts.
It’s also possible that consecutive outbreaks are unrelated.
Norovirus is one of the most common stomach viruses in the United States and around the world.
Airports, hotels, restaurants, sporting events, shopping centers, and other crowded public places can all become locations where people are exposed before they ever board a cruise ship.
That means some passengers may unknowingly bring the virus onboard after becoming infected during their travels.
Ruby Princess Isn’t the Only Ship to Face Repeat Illness Reports
While consecutive outbreaks often generate headlines, Ruby Princess is far from the first cruise ship to experience multiple gastrointestinal illness events over a relatively short period.
Several recent examples include:
- National Geographic Sea Bird operated by Lindblad Expeditions reported illness across multiple consecutive voyages, although only two cruises exceeded the CDC’s reporting threshold.
- Royal Caribbean’s Enchantment of the Seas experienced outbreaks on consecutive sailings during March 2023, with a combined total of 272 reported illnesses.
- Holland America Line’s Rotterdam recorded outbreaks on two different voyages during February and March 2025, totaling 278 reported cases. Although those cruises were separated by roughly two weeks, health officials suggested additional lower-level illnesses may have occurred between sailings without reaching reporting requirements.
These examples demonstrate that repeat illness events, while certainly unwelcome, are not unique within the cruise industry.
What This Means for Cruise Travelers
News about gastrointestinal illness outbreaks can understandably concern passengers, especially those preparing for an upcoming vacation.
However, it’s important to remember that millions of people cruise each year without experiencing any health issues.
Cruise lines continue investing heavily in sanitation procedures, onboard medical facilities, food safety practices, and passenger education to reduce the spread of illnesses whenever they occur.
For Ruby Princess, the latest reports remain relatively limited compared with the previous voyage, and there is currently no indication that the ship’s itinerary or operations have been significantly affected.
As the sailing continues through Alaska, Princess Cruises will likely keep monitoring the situation closely while maintaining enhanced cleaning measures.
Unless illness numbers increase substantially, the current voyage is expected to conclude in San Francisco on July 12 as originally scheduled.
