Hantavirus Quarantine Ends for All 18 Americans from MV Hondius Cruise Ship Outbreak

Six weeks of isolation, and a clean bill of health

The last eight Americans held at the National Quarantine Unit in Omaha completed their 42-day monitoring period on Sunday, June 22, marking the formal end of the U.S. response to the Andes hantavirus outbreak that killed three people aboard the Dutch expedition cruise ship MV Hondius.latimes The Department of Health and Human Services confirmed the closure Monday, saying no sustained transmission of the virus had been identified on American soil.abcnews The CDC is expected to formally close its response operation in the coming days, according to reporting from the Wall Street Journal.wsj

In total, 18 Americans were quarantined at the University of Nebraska Medical Center after being evacuated from the MV Hondius when the outbreak was confirmed in early May.latimes Ten of those passengers had been allowed to leave earlier under agreements with their home states for close monitoring; six remained for the full period voluntarily, and one — Angela Perryman of Florida — was held under a contested federal quarantine order she described as "a political stunt."latimes

How the outbreak unfolded across the Atlantic

Investigators believe the outbreak began when a Dutch passenger inhaled aerosolized rodent waste while visiting South America before boarding the ship in Ushuaia, Argentina, on April 1.cidrap The MV Hondius was carrying 121 passengers and 61 crew on a multi-week voyage through the South Atlantic when the primary case deteriorated. By the time the ship reached Cape Verde on May 3, British and Dutch authorities had already alerted the WHO to a cluster of severe respiratory illnesses; the first two deaths had occurred.cidrap

In all, 13 cases — 11 confirmed and two probable — were identified, all among people who had been aboard the vessel.abcnews Investigators concluded the remaining 12 cases resulted from person-to-person transmission of the Andes virus, which uniquely among hantaviruses is capable of spreading between humans.cidrap The case-fatality rate stood at roughly 23 percent.cidrap

Lessons for cruise ship preparedness

A new report published in Eurosurveillance by Dutch and international researchers credited a coordinated multinational response — including medical evacuations, repatriation flights to eight countries, and contact tracing of 188 high-risk contacts — with containing the outbreak to the ship's passenger and crew population.cidrap Health authorities also tracked passengers who had disembarked at remote islands such as Saint Helena and Tristan da Cunha before the outbreak was recognized.cidrap

The authors called on the shipping industry to adopt formal preparedness protocols for expedition and cruise vessels, including early recognition of unusual respiratory clusters, rapid international information-sharing, and onboard infection-prevention procedures.cidrap Public health agencies noted the outbreak exposed how poorly the global system is designed to manage disease events on vessels crossing multiple jurisdictions — a gap they say must be addressed before the next voyage turns deadly.latimes