According to a report by the World Health Organization (WHO), as of May 8, 2026, there were eight cases of hantavirus found on the cruise ship MV Hondius, sailing from Argentina to the Canary Islands, Spain.
Six of these cases were confirmed positive, and two were suspected or suspected of being infected. Of these cases, three died.
Hantavirus is a virus that can cause lung and kidney problems. This disease is classified as zoonotic because it is transmitted by rodents, including rats.
According to the WHO, hantavirus cases are relatively rare globally. However, the disease has a high case fatality rate (CFR), especially in the Americas.
"Hantavirus infection is associated with case fatality rates of <1–15% in Asia and Europe, and up to 50% in the Americas," the WHO stated in its May 8, 2026, Disease Outbreak News report.
"Although there is no licensed treatment or vaccine for hantavirus infection, early supportive care and prompt referral to a facility with a fully equipped ICU can improve the chances of survival," it continued.
According to the WHO, hantavirus infection in humans generally occurs through contact with the urine, feces, or saliva of rodents, such as mice and rats.
Hantavirus infections in humans are generally reported in rural settings, such as forests, fields, and farms, where rodents are present and the opportunity for exposure is greater.
Hantavirus disease is characterized by headache, dizziness, chills, fever, myalgia (muscle pain), and gastrointestinal symptoms, such as nausea, vomiting, diarrhea, and abdominal pain, followed by sudden respiratory distress and hypotension (low blood pressure).
Symptoms usually appear between 1 and 6 weeks, but can take up to 8 weeks, after initial exposure to the virus.