Person-to-Person: Why This Hantavirus Is Different
Most hantaviruses can't spread between people. Andes virus can — and that single feature explains the global response to the Hondius cluster.
The exception in the hantavirus family
Most hantaviruses — Sin Nombre in North America, Puumala in Europe, Hantaan in Asia — spread only through inhalation of aerosolised rodent urine, droppings, or saliva. Human-to-human transmission has not been documented for those species (US CDC: Hantavirus).
Andes virus (ANDV) is the exception. Person-to-person transmission of ANDV was first documented during a 1996 outbreak in El Bolsón, Argentina, and was confirmed again in a sustained 2018–2019 cluster in Epuyén that infected health workers and family contacts (NPR, 5 May 2026).
What that means on a cruise ship
A confined ship environment with shared ventilation, dining, and corridor space is a worst-case setting for a respiratory pathogen with person-to-person spread. ECDC's 6 May rapid risk assessment notes that:
- Close, prolonged contact with an infected case (household-like contact, shared cabin) is the highest-risk exposure.
- Brief casual contact (passing in a corridor) is much lower risk.
- The virus is not known to spread efficiently like influenza or SARS-CoV-2.
Public-health implications
This is why dozens of contacts who disembarked the Hondius at earlier port calls are being individually traced across multiple countries by Africa CDC, ECDC, US CDC, and PHAC. The ECDC outbreak page is updated daily (ECDC outbreak tracker).
Sources: NPR, ECDC, US CDC, peer-reviewed Andes-virus transmission studies.
