Scientists say you’re almost certainly safe from hantavirus, but there is one specific thing you must do for that

You are almost certainly safe from the hantavirus, even with the recent headlines surrounding a cruise ship outbreak. While the deaths of three passengers on the MV Hondius have caused international concern and a scramble to trace those exposed to the rare Andes strain, experts are clear that personal risk levels remain unchanged. As detailed by Yahoo Health, the scientific community’s consensus is that the public should not panic.

The Andes strain circulating on that cruise ship is unusual because it appears capable of spreading between humans. Virologists like Dr. Scott Pegan of the UC Riverside School of Medicine emphasize that the cruise ship environment was a self-contained breeding ground for transmission. Dr. Pegan noted that the virus may build up a higher concentration in saliva, and in a confined ship cabin, that creates a respiratory environment likely to infect more people.

Dr. Marieke Rosenbaum, a veterinary public health expert at Tufts University’s Cummings School of Veterinary Medicine, agrees that the cruise ship provided near-perfect conditions for the virus to spread beyond what would occur in a typical setting. She notes that if those passengers had been at home, they likely would have stayed there once they fell ill, significantly limiting exposure to others. This type of spread is what researchers call nosocomial, meaning it happens during close or intimate contact with an already infected individual. Outside of that specific, enclosed environment, the threat of human-to-human transmission is very low.

The real hantavirus risk has always been in your backyard, not on a ship

For most of its history, hantavirus has been a disease associated with close rodent contact in places like dusty barns, cabins, or sheds. Both Dr. Pegan and Dr. Rosenbaum are clear that the primary route of infection is through aerosolized particles from rodent urine, droppings, or saliva. The risk is not about interacting with people, but about how you interact with your environment, particularly enclosed spaces where rodents have been active.

This brings us to the one thing experts say you must avoid: do not sweep or vacuum areas where you suspect rodent activity. Sweeping or vacuuming launches dry particles of rodent waste into the air, which are then inhaled. Instead, spray the area with water to dampen the particles, wear gloves and a mask, and ensure the space is well-ventilated before cleaning.

While the Andes virus is the only hantavirus known to spread person to person, the rodents that carry it have not been found in the United States. Wild Norway rats in many American cities can carry other pathogens, including the Seoul virus. Researchers like Dr. Rosenbaum, who leads the Boston Urban Rat Study, are working to understand what is circulating in these populations, though securing funding for such surveillance remains difficult without a major outbreak to force the issue.

There is currently no specific antiviral treatment or vaccine available for the Andes virus, a gap that parallels the situation with other infectious diseases, including the measles surge across the US that has drawn renewed calls for stronger public health messaging. Dr. Pegan’s lab is working on a vaccine platform for bunyaviruses that could theoretically be adapted for hantaviruses, though it is not ready for public use. Because severe cases are rare, medical attention focuses on managing symptoms early.

The CDC notes that the Andes virus originates in South America, a region that has also seen other outbreak advisories in recent months, including a chikungunya alert for Bolivia. Anyone who has recently traveled to South America and develops flu-like symptoms, including muscle aches, fever, or difficulty breathing, should inform their doctor immediately.

Seeing a rat on the street is not a reason to panic, but keeping your distance is advisable. Practicing safe cleaning habits in enclosed spaces and avoiding the inhalation of aerosolized rodent waste remain the most effective protective steps available to the general public.

Tags: Hantavirus, Andes virus, MV Hondius, CDC, public health, disease prevention, rodent-borne illness, South America, UC Riverside, Tufts University, cruise ship outbreak, infectious disease, vaccine, Scott Pegan, Marieke Rosenbaum