Hantavirus Outbreak On Cruise Ship
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The virus's long incubation period is making it difficult for investigators to pinpoint where the infection occurred.
Since the family of rodent-borne infections were identified in the 1950s, they have turned up all over the world.
Cases span more than a dozen states, with people getting sick from a strain of the bacterium that is showing resistance to a number of antibiotics.
A suspected hantavirus outbreak on a cruise ship off West Africa has killed three people, with the WHO coordinating emergency medical evacuations.