US Passenger in Nebraska as Deadly Hantavirus Outbreak Spreads from Cruise Ship

A U.S. passenger had arrived in Nebraska while a French woman was isolating in Paris, showing how quickly a cruise-ship infection can become a cross-border tracking problem for health officials. The hantavirus cluster tied to the MV Hondius had already spread across multiple countries by the time passengers separated after the voyage in the Atlantic Ocean.

The World Health Organization said the ship carried 147 passengers and crew, and 34 of them had already disembarked when the cluster was first reported on May 2. By May 8, the agency said eight cases had been reported, including three deaths. Six of the cases were laboratory-confirmed hantavirus infections, all caused by Andes virus, and the outbreak’s case fatality ratio stood at 38 percent.

For U.S. officials, the immediate concern was not mass spread but the problem of locating and assessing people who had already traveled on. The Centers for Disease Control and Prevention said the risk to the American public remained extremely low. It also said the U.S. Department of State was leading a coordinated response that included direct contact with passengers and coordination with domestic and international health authorities.

The CDC said it had issued health guidance for impacted American passengers and exposure-assessment guidance for people on the ship or exposed on an aircraft. That guidance reflects the central public-health challenge in this case: the exposure did not stay on the vessel. Passengers left the ship, boarded planes, and dispersed into new cities, including Nebraska and Paris, before the cluster was fully defined.

In France, Health Minister Stephanie Rist said the woman’s health worsened in the hospital overnight. Rist said the woman was among five French passengers repatriated to Paris, and that she developed symptoms during the flight. Four other French passengers tested negative and will be re-tested, underscoring how quickly symptom monitoring can change after international travel.

The World Health Organization said it was developing operational guidance for the safe and respectful disembarkation and onward travel of passengers and crew. For public-health agencies, the Hondius outbreak has become a test of how well they can trace a dangerous infection after travelers have already scattered across borders.