A suspected rodent-borne disease has been linked to an outbreak on a cruise ship that has left three people dead and several others ill, prompting ongoing investigations by global health authorities.
Research shows that hantaviruses have existed for centuries, with past outbreaks recorded across Asia and Europe. In those regions, infections have commonly been associated with hemorrhagic fever and kidney complications. It wasn’t until the early 1990s that a new strain was identified in the southwestern United States, where it was found to cause a severe respiratory illness now known as hantavirus pulmonary syndrome.
Public awareness of the virus increased last year following the death of Betsy Arakawa, the wife of late actor Gene Hackman, who succumbed to a hantavirus infection in New Mexico.
According to the World Health Organization, detailed investigations into the cruise ship outbreak are still underway. These include laboratory testing, epidemiological studies, and genetic sequencing of the virus to better understand its source and behavior.
Hantavirus is primarily transmitted through contact with rodents or their bodily fluids, such as urine, saliva, or droppings. Infection can occur when contaminated particles become airborne and are inhaled, especially in enclosed or poorly ventilated spaces like cabins, sheds, or homes. Although rare, limited human-to-human transmission has also been reported.
The U.S. Centers for Disease Control and Prevention began closely monitoring the virus after a 1993 outbreak in the Four Corners region, where Arizona, Colorado, New Mexico, and Utah meet. A physician working with the Indian Health Service first identified a pattern of unexplained deaths among young patients, leading to the discovery of the disease.
Most reported cases in the United States occur in western states, particularly in New Mexico and Arizona, where human exposure to rodents is more likely in rural environments.
Early symptoms of hantavirus infection often resemble the flu, including fever, chills, muscle aches, and headaches, making it difficult to diagnose in its initial stages. However, the condition can quickly worsen. In cases of hantavirus pulmonary syndrome, symptoms may escalate within one to eight weeks after exposure, leading to breathing difficulties as fluid accumulates in the lungs.
Another form of the disease, hemorrhagic fever with renal syndrome, typically develops within one to two weeks and primarily affects the kidneys.
Fatality rates vary depending on the strain. Hantavirus pulmonary syndrome has a mortality rate of around 35%, while hemorrhagic fever with renal syndrome ranges between 1% and 15%, according to health experts.
There is currently no specific cure or targeted treatment for hantavirus infections. However, early medical care significantly improves survival chances. Researchers continue to study the disease to understand why it affects individuals differently and how immunity develops.
Health officials emphasize that prevention remains the most effective defense. Avoiding contact with rodents and their droppings is critical. When cleaning contaminated areas, experts recommend using protective gloves and disinfectants like bleach. Sweeping or vacuuming should be avoided, as it can release infectious particles into the air.
