MADRID—Health authorities across four continents Thursday were tracking down and monitoring passengers who disembarked a hantavirus-stricken cruise ship before its deadly outbreak was detected, and trying to trace others who may have come into contact with them since then.
In Argentina, a team of investigators tasked with determining the origins of the outbreak has yet to leave for the southern town they suspect is where a Dutch couple contracted the virus while on a bird-watching trip, officials from the country’s Health Ministry told The Associated Press on Thursday.





