The Illinois Department of Public Health (IDPH) has launched an investigation into a possible hantavirus case involving a resident from Winnebago County. Notably, this case is entirely separate from the recent hantavirus outbreak associated with the MV Hondius cruise ship.
Officials stated, “IDPH is investigating a potential Hantavirus case in an Illinois resident not connected to the recent outbreak pertaining to the MV Hondius cruise ship. The resident lives in Winnebago County, has not traveled internationally, and has not come in contact with individuals associated with the MV Hondius outbreak,” as they announced.
Evidence suggests the individual may have contracted a North American strain of the virus while cleaning a place with rodent droppings. Unlike the Andes strain responsible for the cruise ship incident, the North American strains have not been shown to spread from person to person. Overall, Illinois residents face very low risk of acquiring any form of Hantavirus.
Currently displaying mild symptoms, the individual did not require hospitalization and is on the road to recovery. The North American strain is primarily transmitted through contact with infected rodent droppings or urine, not through human interaction.
The CDC is conducting confirmatory laboratory tests, a process expected to take around 10 days. Initial commercial lab results are not definitive and will also necessitate this timeframe.
Aside from this potential case, the state has documented only seven confirmed hantavirus cases since 1993, the latest being in March 2025. North American strains transmit via contact with rodent droppings, in stark contrast to the Andes strain responsible for the MV Hondius outbreak, which is known for person-to-person transmission.
In a follow-up, the IDPH reiterated, “The Illinois Department of Public Health (IDPH) has not been notified of any Illinois residents being passengers on the MV Hondius during the Hantavirus outbreak.”
“Patient Zero” in the cruise ship hantavirus outbreak has been identified as ornithologist Leo Schilperoord, whose passion for birds led him to a landfill in Argentina to observe birds that may have cost him his life. pic.twitter.com/voYfg4HTvG
— Leading Report (@LeadingReport) May 9, 2026
As of now, infections linked to the MV Hondius outbreak have surged to 11. The World Health Organization and health officials worldwide are engaged in aggressive contact tracing after several infected passengers flew prior to the outbreak being identified.
With the potential for a lengthy incubation period, which can extend for several weeks, there remains a chance for additional spread. Nonetheless, officials maintain that the overall risk to the public continues to be low.
