Hantavirus Outbreak on Cruise Ship: What You Need to Know

An outbreak of hantavirus has affected passengers on a cruise ship, resulting in three deaths and additional illnesses. Global health officials assess the risk to the public as low due to the virus’s limited person-to-person transmission.

Understanding Hantavirus

Hantaviruses are found worldwide, typically spreading through contact with infected rodents. Although rare, the virus can cause severe lung infections or kidney failure. According to Maria Van Kerkhove from the World Health Organization, exposure to hantavirus is unlikely for most people.

This is not the next COVID, but it is a serious infectious disease.

Transmission and Risks

According to Paul Hunter, a medicine professor at the University of East Anglia, hantavirus spreads through aerosolized rodent droppings. The Andes virus strain might spread between humans in rare cases. Health officials are taking precautions for passengers returning from the cruise.

Unlike COVID-19, hantavirus is harder to transmit but can be more dangerous once symptoms occur.

Potential for a Pandemic

The outbreak, termed a “cluster” or “outbreak” by health officials, poses a minimal risk of becoming a pandemic. The virus is not new, and transmission appears limited.

Source Investigation

Investigations in Argentina suggest the virus may have originated during a birdwatching trip in Ushuaia. Climate change is thought to be contributing to the rise in hantavirus cases in Argentina.

Spread and Symptoms

Transmission mainly occurs through contact with rodent excreta, which becomes airborne. Symptoms start with flu-like signs and can progress to life-threatening conditions.

• Symptoms: Fever, chills, aches, headache
• Severe cases: Lung issues, hemorrhagic fever, kidney failure

About 35% of those with hantavirus pulmonary syndrome die, as per CDC data.

Prevalence and Historical Context

Hantavirus infections remain uncommon, with the WHO documenting 229 cases and 59 deaths in the Americas in 2025. The U.S. has tracked the virus since a 1993 outbreak in the Four Corners region.

The Andes Virus

The hantavirus family, including the Andes virus, does not typically spread person-to-person except in rare cases. Close contact is required for potential transmission.

Ongoing Research and Safety Measures

No specific treatment exists for hantavirus, but early medical attention can improve survival chances. Researchers continue to investigate long-term effects and potential treatments.

Prevention involves minimizing rodent exposure and using safe cleaning practices to prevent airborne virus particles.