Hantavirus infections cruise ship

The World Health Organization suspects rare human-to-human transmission of hantavirus may have occurred among close contacts on the MV Hondius cruise ship. As of May 4, 2026, authorities identified seven cases of hantavirus infection, including two laboratory-confirmed cases and five suspected cases.

Key statistics:

• Three fatalities recorded among the infected individuals.
• One patient remains in critical condition under medical care in South Africa.
• Symptom onset ranged from April 6 to April 28, 2026, with symptoms including fever and gastrointestinal distress.
• The index case died on April 11, 2026, while aboard the ship.
• A total of 147 individuals were on board the MV Hondius during this outbreak.

This outbreak has led to a coordinated international response involving multiple countries such as South Africa, Spain, and the United Kingdom. Authorities are conducting case investigations and facilitating medical evacuations. A British crew member and a Dutch colleague are among those being evacuated due to respiratory symptoms.

The MV Hondius departed Ushuaia, Argentina, on March 20, 2026, en route to the Canary Islands via Cabo Verde. Hantaviruses are typically transmitted through contact with infected rodent excreta, saliva, or urine. However, the WHO’s suspicion of human-to-human transmission highlights a concerning development regarding zoonotic infections in confined environments like cruise ships.

Maria Van Kerkhove from the WHO stated, “We do believe that there may be some human-to-human transmission that’s happening among the really close contacts.” This incident underscores how zoonotic viruses can emerge in highly connected settings such as cruise ships.

Despite these developments, no evidence suggests that this outbreak has spread within African countries or beyond those directly involved with the cruise ship. The exact source and mode of exposure for these hantavirus infections remain unclear. Additionally, officials have not confirmed whether there is ongoing transmission among crew members.