The recent hantavirus outbreak has been linked to the cruise ship MV Hondius, involving passengers from multiple countries.
According to the World Health Organization (WHO), as of early May 2026 there were confirmed and suspected cases of hantavirus infection, including several deaths.
WHO reported that the outbreak is suspected to involve the Andes hantavirus strain, one of the few hantaviruses known to allow limited person-to-person transmission.
The Centers for Disease Control and Prevention (CDC) stated that the overall risk to the general public in the United States remains very low.
CDC is monitoring travelers returning to the United States from the affected cruise ship, including individuals in California, Arizona, and Georgia.
Hantaviruses are primarily transmitted through exposure to infected rodent urine, droppings, or saliva. Human-to-human spread is considered rare.
Symptoms may initially resemble influenza, including fever, fatigue, muscle aches, and headache, but severe cases can rapidly progress to respiratory distress.
WHO and CDC emphasized the importance of:
Rodent control and sanitation
Early identification of symptoms
Contact tracing and monitoring of exposed individuals
Infection prevention measures during travel and healthcare response
WHO clarified that this outbreak is not considered the start of a pandemic, as hantavirus does not spread easily between people like respiratory viruses such as COVID-19.
CDC historical surveillance data indicate that hantavirus infections remain rare in the United States, with fewer than 900 reported cases since national tracking began in 1993.