Can hantavirus spread from human to human?

Generally, no. Most hantavirus species — including Sin Nombre virus, Puumala, Hantaan, and Seoul — are transmitted only through contact with infected rodents or their droppings, urine, and saliva. The single documented exception is the Andes virus (ANDV), found primarily in Argentina and Chile. Andes virus has been linked to limited person-to-person transmission, but only in cases of close, prolonged contact (e.g., household members or healthcare workers without protection). The MV Hondius cluster involves Andes virus, which is why contact tracing is being conducted internationally despite the rarity of human-to-human spread.