Hantavirus Outbreak Confirmed on Dutch Cruise Ship

The MV Hondius, a Dutch cruise ship with approximately 150 passengers, is currently en route to the Canary Islands after evacuating three ill passengers for treatment. The World Health Organization (WHO) confirmed a hantavirus outbreak on May 4, noting seven infections and three deaths since early April. An eighth case was confirmed on May 6.

The virus, identified as the Andes strain of hantavirus, has an incubation period of one to eight weeks, raising concerns that additional cases may still be identified. Health officials around the world are monitoring passengers who disembarked from the ship in late April, emphasizing that the risk to the public remains low.

The Hondius began its 33-day journey in Argentina on April 1 and was sailing north when the outbreak occurred. There have been no reports of rodents on the ship, leading researchers to speculate that the initial infections likely occurred during activities in Argentina or Chile before boarding. The Andes virus, a New World hantavirus, is known to affect the lungs and is fatal in about 40% of cases.

Health officials are tracking 29 people who disembarked from the ship on April 24 before the outbreak was identified. Those with significant exposure will likely be quarantined to monitor for symptoms. Additionally, residents of three U.S. states and a flight attendant in the Netherlands are being monitored for possible hantavirus symptoms.

The WHO emphasizes that while additional cases may emerge from the cruise ship outbreak, the risk beyond the ship remains low. Most hantavirus cases are acquired directly from rodents or their excrement, not from human-to-human transmission. Health officials advise travelers to be aware of infection risks, especially in unfamiliar environments.