Hantavirus: How it differs from COVID

Key Points:

• The hantavirus outbreak on the cruise ship MV Hondius, which caused three deaths and several infections between April and May 2026, has raised international concerns, especially as the ship docked in Tenerife, Spain, with passengers returning to countries like Germany, France, and Australia.
• Unlike COVID-19, hantaviruses such as the Andes virus spread less easily and require close contact for transmission, allowing for more effective containment through basic public health measures like social distancing and isolation.
• Historical data from a 2018-2019 hantavirus outbreak in Argentina shows that enforcing isolation and quarantine can significantly reduce transmission rates, with the reproductive number dropping from 2.12 to 0.96 after control measures.
• Despite initial delays in confirming hantavirus as the cause of death on the MV Hondius, Spanish health authorities implemented strict precautions upon docking, including the use of masks, protective suits, and sealed handling of personal belongings to prevent further spread.
• Experts emphasize that hantavirus is unlikely to cause a global pandemic similar to COVID-19, as infections remain relatively rare worldwide, with 229 cases and 59 deaths reported in the Americas in 2025, and no vaccine currently available.