What Is Hantavirus — and How Is It Affecting the UK?

Hantavirus is not a single virus, but a group of rodent-borne viruses that can infect humans. It usually spreads when people breathe in particles from infected rodent urine, droppings, saliva, or contaminated dust, rather than through casual everyday contact. UK health guidance says hantaviruses have been found in both wild and pet rodents in the UK, although serious human illness remains uncommon.

The reason hanta virus is being discussed again is partly linked to international cases and travel-related concern. UK travel health updates reported hantavirus cases and deaths in Argentina in early 2026, while recent reports also describe a suspected outbreak on a cruise ship involving a British patient.