Hantaviruses are a family of RNA viruses carried mainly by wild rodents. Most strains spread to humans through inhalation of aerosolized particles from rodent urine, droppings, or saliva, or through direct contact with contaminated material. Person to person transmission is rare across the family.
The strain at the center of the MV Hondius outbreak is the Andes virus, native to southern South America. Andes is the only hantavirus with documented human to human transmission, which is why this outbreak spreads so unusually for the family.
Symptoms typically begin one to eight weeks after exposure: fever, fatigue, muscle aches, headache. The most severe form, hantavirus pulmonary syndrome (HPS), can progress quickly to fluid in the lungs and respiratory failure. Andes also causes a hemorrhagic form with kidney involvement.
There is no specific antiviral treatment approved for routine use. Care is supportive: oxygen, fluid management, intensive care for severe cases. Early hospitalization improves outcomes. Prevention focuses on reducing rodent exposure and, in outbreak settings like Hondius, isolating contacts and tracing transmission chains.
This is general educational information drawn from public health guidance. It is not medical advice. If you suspect exposure or symptoms, contact a health authority directly.