France confirms first human Shamonda virus case, no general risk

French authorities confirmed on Thursday that a severely immunocompromised patient who died at a Lyon hospital in early October was infected with the Shamonda virus, the first documented human case of a livestock virus previously considered non-transmissible to humans.

Why it matters: The case breaks a decades-old assumption about the virus, which reached European cattle for the first time this summer, though the health and agriculture ministries say no health risk to the general population is identified at this stage and investigations, with the WHO and ECDC notified, are continuing.

Data as of Joint statement by France's health and agriculture ministries, October 22, 2026, as quoted in full in French reporting (VIDAL, in French) and reported by Al Jazeera and France24 with AFP, both read in full; the patient details, the risk assessment and the infection hypothesis are the ministries' own. Developing item.

France’s health and agriculture ministries said a Shamonda virus infection was detected in a severely immunocompromised patient treated at the Hospices civils de Lyon for a serious illness, who died in early October, making it the first documented human case despite decades of circulation in animals in Africa and Asia. The ministries called it an exceptional case in a strongly immunocompromised patient, said brain complications observed before the death were very probably linked to the infection, and put the leading hypothesis as a bite from a Culicoides midge in eastern France, where the virus circulated in animals this spring and summer.

Shamonda is an orthobunyavirus transmitted to animals, mainly cattle, by Culicoides biting midges, first detected in Nigeria in the mid-1960s and reported sporadically in cattle in Africa and Japan before being identified in Europe for the first time in the summer of 2026, in cattle farms in France, Germany and Switzerland among others. The ministries said that, on current knowledge, no health risk to the general population is identified, and that clinical, biological and epidemiological investigations are continuing, with the World Health Organization and the European Centre for Disease Prevention and Control notified.

France confirms first human Shamonda virus case, no general risk

Sources