Shamonda Virus: Why the first human infection in France matters

On October 20, 2026, French health authorities notified the World Health Organization (WHO) of the first confirmed case of a human being infected with the Shamonda virus, as reported by the global health body. The patient, who was severely immunocompromised, passed away earlier in October, according to a statement released jointly by the French health and agriculture ministries, reported by AFP on Thursday.

The WHO is currently in communication with French authorities to gather more information and closely monitor the situation.

Tedros Ghebreyesus, the WHO Director-General, revealed in a series of tweets on Thursday that the Shamonda virus had only been detected in animals prior to this incident. He emphasized that the patient's weakened immune system, due to their immunocompromised state, made them susceptible to the virus, ultimately leading to their demise. Ghebreyesus expressed his deepest condolences to the patient's family and friends.

However, the WHO chief also indicated that more research is necessary to fully comprehend the virus's mode of transmission. The French patient resided in an area where the Shamonda virus was circulating among animals, and the Culicoides midge, a small fly-like insect, was also present. The WHO has issued a warning about the possibility of a complex Ebola spread after Nigeria confirmed a case.

Here are the key points to understand about the Shamonda virus, as outlined by the WHO:

1. The Shamonda virus primarily impacts animals, including cattle, sheep, goats, and horses.

2. The virus is believed to spread among animals through the bites of midges, a small, fly-like insect. The virus is not known to transmit directly from one animal to another, except during pregnancy when an infected animal can pass the virus to the fetus.

3. The Shamonda virus has been detected in animals in African countries and Japan. Since June 2026, it has also been identified in dairy cows and horses in Western Europe, such as Germany, Switzerland, Austria, Belgium, and France.

4. While the case of the Shamonda virus in a human remains isolated, meaning it has not spread to other individuals, the WHO continues to monitor the situation and will provide updates as new information becomes available.