As hantavirus cases linked to a cruise ship continue to draw national attention, Syracuse University public health expert David Larsen is available to offer insight on transmission risks, outbreak response, and what this unusual case reveals about infectious disease preparedness.

Larsen is a professor and chair of public health in Syracuse University’s Maxwell School of Citizenship and Public Affairs, whose work includes wastewater-based epidemiology. He notes that hantavirus cases in a cruise ship setting are highly uncommon—and raise immediate questions about the vessel’s environment.

“Hantavirus is transmitted by rodents, so I would first wonder about rodents on the cruise ship,” Larsen says. “Person-to-person transmission is incredibly rare and would not be the primary suspect.”

With three deaths already reported, Larsen says identifying the source of infection is the most urgent priority for public health responders. “Knowing how the infections occurred is a primary concern. If there are rodents on the ship with hantavirus—as I would suspect—then removing them would be the next step.”

Larsen also points to wastewater testing as a potentially valuable tool in confirming whether the threat has passed. “Wastewater testing could be useful here to confirm that hantavirus is no longer present on the cruise ship, as could other types of environmental testing,” he says.

On the broader takeaway, Larsen is direct: “We are always at risk of infectious diseases, and sometimes in unexpected ways. We need to continue to invest in public health and outbreak response so that we can control outbreaks when they do happen.”

Professor Larsen’s comments in this article can be directly quoted. To connect with him for additional questions or an interview, please contact:

Daryl Lovell, Media Relations
dalovell@syr.edu