France Confirms First Human Case of Shamonda Virus

French health authorities confirmed the country’s first human case of Shamonda virus on 22 October 2026. The patient died after contracting the virus. Shamonda virus is an insect-borne virus primarily associated with livestock, particularly cattle, and is transmitted by biting midges.

Human Case and Public Health Assessment

The confirmed case was the first reported human infection in France. Before this case, Shamonda virus was considered non-transmissible to humans. French authorities stated on 22 October 2026 that they saw no risk to the general population at that stage. The leading hypothesis was that the patient had been infected in eastern France, where the virus had circulated among animals during spring and summer 2026.

Virus Classification and Transmission

Shamonda virus belongs to the genus Orthobunyavirus, within the family Peribunyaviridae. Orthobunyaviruses are arthropod-borne viruses, also called arboviruses, and are transmitted between hosts by arthropods. Biting midges are the vector identified for Shamonda virus. Its known animal hosts include livestock, with cattle particularly affected. The reported human infection establishes that a human case has occurred, although the information available does not establish a route of infection beyond the suspected exposure in eastern France.

Animal Detections and Geographic Spread

Shamonda virus was first identified in Nigeria in the mid-1960s. It has since been detected sporadically in animals in Africa and Japan. The virus was also reported as spreading among several European countries during 2026. In France, animal circulation during spring and summer 2026 was reported in the east of the country. These animal detections preceded the country’s first confirmed human case.

Important Facts for Exams

• Shamonda virus is an insect-borne member of the genus Orthobunyavirus.
• Biting midges transmit Shamonda virus, which primarily affects livestock such as cattle.
• The virus was first identified in Nigeria in the mid-1960s.
• French health authorities confirmed the country’s first human case on 22 October 2026.

The patient in France died after contracting Shamonda virus. Authorities assessed the risk to the general population as absent at the time of their 22 October 2026 statement.