A student at Geneva High School in Ontario County, New York, has been identified as the subject of an investigation into a suspected hantavirus case.
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Ontario County health officials stressed that the case is not connected to the outbreak on the cruise ship MV Hondius, and that any form of the virus contracted on the mainland United States is different. County Public Health Director Kate Ott, in a statement to the media, stressed that this version is “not spread person to person,” but rather “between mice and humans.”
“If I have it and I sneeze on you, you’re not going to get it,” Ott said. She added that the student suspected of an infection will not have to quarantine.
Newsweek reached out to the Ontario County Department of Health via email for further comment.
In a message from the school district to families, seen by Rochester news station WHAM, Superintendent Bo Wright said that the district understands the stress that a rare illness can cause and the questions and concerns it raises among families, but that school personnel are working with the county Department of Health and following its guidance.
“As shared in our communication to families and staff, health officials have advised there is no evidence of risk to other students or staff related to this situation,” Wright said.
Different Strains of Hantavirus
Hantavirus infections are typically acquired through exposure to infected rodents rather than from other people. Individuals most often become infected by inhaling airborne particles contaminated with rodent urine, droppings, or saliva, especially in enclosed or poorly ventilated environments.
Person‑to‑person transmission is generally considered extremely uncommon for most hantavirus strains, and the virus is not easily spread between humans. Health officials emphasize that the overwhelming majority of cases stem from environmental exposure, with only rare and limited circumstances raising concern about potential human transmission.
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The Andes strain of hantavirus stands apart from others because it has demonstrated the ability to spread between people. Investigations into outbreaks have highlighted this variant as one of the few known to enable human‑to‑human transmission, though such spread remains unusual.
Even with this capability, transmission of the Andes strain is still considered limited and typically requires close contact, with overall public health risk remaining low. Experts stress that while it can move between individuals, it does not spread as easily or widely as more contagious respiratory viruses.
Hantavirus on the MV Hondius
The hantavirus outbreak linked to the Hondius emerged after passengers fell ill during a voyage from Argentina to Antarctica and several remote South Atlantic islands in April. The World Health Organization has reported 11 cases connected to the ship worldwide, including three deaths, with eight infections confirmed through laboratory testing. The outbreak involves the Andes strain of hantavirus.
As passengers dispersed internationally before the outbreak was identified, health agencies across multiple countries launched extensive contact‑tracing efforts. In the United States, the Centers for Disease Control and Prevention (CDC) is monitoring 41 people for potential exposure, including passengers who returned home and others who may have encountered infected individuals during travel. Eighteen Americans were placed in federal quarantine facilities in Nebraska and Atlanta after being evacuated from the ship, while additional contacts are being monitored by state health departments. Officials have emphasized a 42‑day monitoring period due to the virus’s long incubation time and have advised those under surveillance to avoid travel and close contact.
In the U.S., the CDC is monitoring people in seven states who were not on the cruise ship but may have been exposed to hantavirus while traveling: California, Kansas, Maryland, Minnesota, New Jersey, North Dakota and Washington.
Five states—Arizona, California, Georgia, Texas and Virginia—are also monitoring seven Americans who returned home in April after being on the Hondius.
What Are the Symptoms of Hantavirus?
Early symptoms of hantavirus include:
- Fever
- Fatigue
- Muscle aches, particularly in the thighs, hips and back
- Headache and dizziness
- Nausea, vomiting or abdominal pain
Though they may present mildly, these symptoms can rapidly progress to life‑threatening respiratory illness. Because symptoms can worsen quickly, doctors urge anyone who develops flu‑like illness after known rodent exposure or contact with a confirmed case to seek medical attention immediately.
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