Dr. Roger Seheult said the physiological mechanisms by which hantavirus causes death in a presentation published Thursday on MedCram [1].

Understanding these mechanisms is critical for clinicians and the public as the virus can lead to rapid, fatal respiratory failure. The education comes amid reports of a specific outbreak involving the Andes strain of hantavirus on the MV Hondius cruise ship [2].

According to reporting on the MV Hondius incident, three people died [4]. There is a discrepancy in the total number of infections on the vessel; one report identified five cases [3], while another said eight people were infected [5].

Seheult, a board-certified physician in internal medicine, pulmonary disease, critical care, and sleep medicine, focuses on how the virus triggers a systemic response. The Andes strain is particularly notable for its ability to spread between humans, unlike many other hantavirus strains.

In the U.S., hantavirus remains a rare but serious threat. Between 1993 and 2023, there were 890 total recorded cases in the U.S. [6]. Regional data shows two recorded cases in Minnesota [7] and five in Wisconsin [8].

Medical professionals use these physiological insights to manage patients who develop Hantavirus Pulmonary Syndrome. The disease typically progresses from flu-like symptoms to severe shortness of breath as the lungs fill with fluid, a process that can lead to death if not treated with intensive supportive care.

“Three people died during the outbreak on the MV Hondius cruise ship.”

The contrast between the rare, sporadic cases in the U.S. and the cluster on the MV Hondius highlights the danger of the Andes strain. While most hantaviruses are contracted through rodent droppings, the human-to-human transmission capability of the Andes strain increases the risk of localized outbreaks in high-density environments like cruise ships.