Seven people were confirmed to have hantavirus following an outbreak on the cruise ship MV Hondius off the coast of Tenerife, Spain [1].
Health officials are monitoring the situation to determine if the virus can spread between passengers, which would fundamentally change the containment strategy. While the outbreak has caused fatalities, experts distinguish the transmission patterns of hantavirus from the respiratory pathogens that caused the COVID-19 pandemic.
Three passengers died during the outbreak [1]. Of those, two passengers who tested positive for hantavirus later died [1]. Following the incident, passengers were evacuated to mainland Spain for screening and monitoring [3]. In the U.S., health officials are monitoring potentially exposed individuals across six states [3].
Catherine Bennett, Deakin Distinguished Professor and Chair of Public Health, said that patients infected with hantavirus are not posing a great risk to others [1]. This assessment is based on the fact that hantavirus primarily spreads through contact with rodent excreta rather than through human breath or touch [2, 4].
Despite this, some reports from MSN indicated that officials suspected possible human-to-human transmission on the cruise ship [4]. However, a CDC public-health expert said human-to-human transmission of hantavirus is extremely rare, which is why they do not expect a pandemic scenario [2].
A spokesperson for the Madrid Health Ministry said that one patient is not suffering symptoms [1]. The distinction between this outbreak and a pandemic is critical for contact tracing and public anxiety. Because the virus typically requires a zoonotic source—meaning it jumps from animals to humans—the risk of a wide-scale community outbreak remains low [2, 4].
“Patients infected with hantavirus are not posing a great risk to others.”
The MV Hondius incident highlights the difference between zoonotic diseases and contagious respiratory viruses. While hantavirus is lethal, its inability to spread efficiently between humans prevents it from becoming a global health emergency. The monitoring in six US states is a precautionary measure to ensure no rare transmission events occurred during travel.
