Orthobunyavirus spreads across Europe with first human fatality

A new Orthobunyavirus from the Simbu group, closely related to the Shamonda virus, is spreading across several European countries. Originally identified in livestock in southern Germany in the summer of 2026, the virus has since been detected in cattle, sheep, goats, horses, and alpacas. Common symptoms in animals include fever, diarrhea, loss of appetite, and decreased milk production, though some horses have exhibited severe neurological symptoms.

The virus is primarily transmitted by biting midges. While most animals recover within days, health authorities are on high alert following the first confirmed human infection. In late October, French authorities reported the death of an elderly man with a weakened immune system who developed severe encephalitis. While it is not yet conclusively determined if the virus was the sole cause of death, the World Health Organization has acknowledged the case.

In addition to Germany, infections have been confirmed in France, Switzerland, Belgium, and the Netherlands.