The United States Centers for Disease Control and Prevention (CDC) says there are currently no confirmed new cases of hantavirus infection in the country, even as health officials continue monitoring dozens of people who may have been exposed.
The CDC confirmed that recent testing of patients at the University of Nebraska Medical Center in Omaha did not identify any active infections, easing immediate concerns about a wider outbreak.
At the same time, officials are closely monitoring at least 41 individuals across 16 US states who were potentially exposed to the virus during a recent international cruise-related health investigation.
About half of those individuals are isolating at home, while the rest remain under medical observation in hospitals in Omaha and Kansas City. Health authorities say all are being carefully tracked through the virus’s incubation period.
The situation began after concerns were raised involving a passenger aboard the cruise vessel MV Hondius. One American passenger, identified as Dr. Stephen Kornfeld of Oregon, initially tested positive for hantavirus while on board the ship.
However, a follow-up test later returned negative results, and officials now believe the first result may have been a false positive. Health authorities also said there is no evidence that the patient developed antibodies, suggesting no actual infection occurred.
Dr. Kornfeld has remained asymptomatic since returning to the United States. He was initially placed in a high-level biocontainment unit in Omaha but has since been moved to a standard quarantine facility as a precaution.
Medical teams emphasize that even with negative test results, monitoring continues because hantavirus infections can have an incubation period of up to 42 days. This means symptoms could still develop after initial testing.
The CDC stated that no new confirmed cases have been reported since early May, and current evidence suggests the overall public health risk remains low.
Additional passengers from the same voyage have also been placed under observation in different US medical facilities. Two individuals previously treated at Emory University Hospital in Atlanta have now been transferred to Nebraska for continued monitoring.
International health authorities are also involved in tracking the situation. The World Health Organization has reported a small number of confirmed and suspected cases linked to the same travel cluster, including cases that resulted in fatalities abroad.
However, officials stress that the number of confirmed infections remains limited, and there is no evidence of widespread transmission.
The cruise ship involved in the investigation continues its journey back to the Netherlands, with remaining passengers still on board under observation protocols. The vessel is expected to complete its voyage soon, after which further assessments may be conducted if needed.
Canadian health authorities are also monitoring a separate group of individuals linked to the same incident, though no symptoms have been reported among those under observation.
Health experts say hantavirus remains a rare but serious disease, typically associated with exposure to infected rodents rather than person-to-person transmission. Cases in the United States are uncommon, and outbreaks are rare.
Officials continue to urge caution and close monitoring until the full incubation period has passed for all individuals involved in the current investigation.
For now, authorities maintain that there is no evidence of an active hantavirus outbreak in the United States, and the situation remains under careful observation as testing and monitoring continue.
