The discovery of Shamonda virus in a human patient in France has introduced an unexpected development in the surveillance of emerging infectious diseases. French authorities have announced the first documented human infection with the virus , which had previously been identified in animals. The patient, who was being treated in Lyon for a serious underlying illness and had severe immune deficiency, died in early October.

The case is attracting scientific attention for a specific reason: a virus previously regarded as an animal pathogen has now been detected in a human. French investigators believe the patient’s neurological complications were very likely associated with the infection, but whether the virus caused or contributed to the death remains under investigation.

The European Centre for Disease Prevention and Control (ECDC) is monitoring the situation alongside French authorities and other European partners. The World Health Organization (WHO) has also been notified.…