Hantavirus Outbreak on Cruise Ship Prompts U.S. Quarantine, CDC Says Public Risk Remains Low

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	Hantavirus Outbreak on Cruise Ship Prompts U.S. Quarantine, CDC Says Public Risk Remains Low Dr. Edgar Williams - Primary Care/Public Health Tell Us USA News Network ATLANTA - Public health officials are closely monitoring a rare but deadly hantavirus outbreak that has drawn international attention following a crisis aboard the MV Hondius, a cruise ship operating near the South Atlantic and West Africa. Despite multiple fatalities and the quarantine of U.S. travelers, experts stress that the risk to the broader American public remains extremely low. Cruise Ship Outbreak The concern centers on a cluster of infections aboard the Dutch expedition vessel earlier this month. The World Health Organization confirmed the virus strain as Andes virus, a hantavirus variant native to South America. Unlike most hantavirus strains, Andes virus is particularly dangerous because it is the only known type capable of human-to-human transmission. At least three deaths have been reported in connection with the outbreak. Seventeen American passengers were evacuated and transferred to a federal quarantine facility in Nebraska, where they remain under medical observation. Health officials note the virus can incubate for up to 56 days, requiring extended monitoring of anyone exposed. Understanding Hantavirus Hantaviruses are primarily spread through contact with infected rodents. In the United States, the most common strain is Sin Nombre virus, which causes Hantavirus Pulmonary Syndrome (HPS), a severe and sometimes fatal respiratory disease. Humans are typically infected through “spillover” exposure involving rodent carriers such as deer mice, cotton rats, and rice rats. The virus most often spreads when contaminated materials become airborne and are inhaled, particularly during activities like sweeping or cleaning enclosed spaces. Transmission can also occur through direct contact with contaminated surfaces followed by touching the face, or more rarely through rodent bites. Symptoms and Severity Early symptoms often resemble the flu, making early diagnosis difficult. Patients may experience fatigue, fever, and severe muscle aches, particularly in the thighs, hips, and back, along with dizziness, chills, and gastrointestinal issues. As the illness progresses, it can rapidly affect the lungs, causing fluid buildup and severe respiratory distress. The mortality rate for HPS in the United States is 38%, according to the CDC. U.S. Risk Assessment Despite heightened attention, the CDC reports no indication of increased domestic risk tied to the cruise ship outbreak. Hantavirus infections in the U.S. remain rare and typically occur as isolated cases. More than 90% of cases are reported west of the Mississippi River, with the highest concentrations in New Mexico, Arizona, and Colorado. Recent high-profile cases, including the 2025 death of Betsy Arakawa, wife of actor Gene Hackman, along with fatalities in San Diego and Mono County, have renewed focus on the virus in the Southwest. Prevention Measures There is no specific treatment, cure, or vaccine for hantavirus. Medical care is limited to supportive interventions such as oxygen therapy and mechanical ventilation. Health officials emphasize prevention, particularly in rural areas or during seasonal cleaning: Ventilate enclosed spaces for at least 30 minutes before cleaning. Avoid sweeping or vacuuming rodent droppings; instead, disinfect with a bleach solution and wipe with disposable materials. Seal entry points in homes and store food in rodent-proof containers. “The best way to stay safe is to keep rodents out,” the CDC advises. “Awareness and proper cleaning practices are the most effective defenses in endemic areas.”