The Centers for Disease Control and Prevention (CDC) recently reported a significant increase in norovirus outbreaks on cruise ships in 2023. This year, there have been 13 recorded outbreaks, the highest number since 2012. The most recent outbreak occurred on a Viking Cruises ship, where approximately 120 passengers and crew members became sick out of a total of 1,200 people on board. The outbreak is believed to have been sourced from a shoreside restaurant in Iceland, where a group of guests had dined, rather than from someone on the ship.
However, there were only four norovirus outbreaks on cruise ships in 2022, even as the demand for cruises increased rapidly following the COVID-19 pandemic. Norovirus is a common viral illness on cruises and has been nicknamed “the cruise ship virus.” However, the CDC noted that outbreaks on cruise ships are a small percentage of all reported norovirus outbreaks in the United States yearly.
It is estimated that an average of 19 to 21 million people contract norovirus each year.
The cause of the surge in cases this year remains unclear, and the CDC has not commented on the matter. A spokesperson for the Cruise Lines International Association stated that cruise ship travel declined significantly during the pandemic years, leading to fewer reported outbreaks at that time.
Norovirus is highly contagious and causes gastroenteritis. It is typically spread through accidental ingestion of fecal matter particles, consuming contaminated food, touching contaminated surfaces and then touching the face, or direct contact with an infected person. The illness is more severe in older adults and young children.
To prevent the spread of norovirus, officials recommend frequent handwashing, staying hydrated, and avoiding uncooked vegetables, fruit with edible skin, and ice. The CDC also advises disinfecting surfaces, handling and preparing food safely, and washing laundry with hot water. Dr. William Schaffner, an infectious disease expert, emphasizes the contagious nature of the virus and suggests that individuals who feel unwell should postpone their trips to avoid exposing others.
According to the CDC, symptoms of norovirus include diarrhea, vomiting, nausea, fever, headaches, body aches, and stomach pain. Symptoms usually develop 12-48 hours after being infected. Recovery usually takes 1-3 days, but the virus is still contagious a few days after recovery. Symptoms can also lead to dehydration.
According to one national food poisoning lawyer, when asked about the steep increase of norovirus infections, he noted “the surge in norovirus outbreaks on cruise ships highlights the need for proper precautions and awareness among passengers. The rapid spread of the virus means we need to be more vigilant in keeping good hygiene like we were for the brief COVID years. Apparently the public has let its guard down. That may be in part due to the industry taking their eye off the ball and trying to make up for lost revenue, as well. But either way, it is a serious situation because this is people’s vacation time, and it should be enjoyed.”
