WHO says the reported death's cause remains unconfirmed

Where this statement fits

Did plague cause the reported death of an employee of Russia's Irkutsk Anti-Plague Institute?

From October 1, 2026, a hospital in Shelekhov, in Russia's Irkutsk region, suspended discharge and admission in several departments. On October 2, People of Baikal reported that a woman who worked at the Irkutsk Anti-Plague Institute had died of plague in Shelekhov, noting that officials had not confirmed plague, and Buryatia's head, Alexei Tsydenov, referred in a post to a woman who died of plague before the post was changed to say possibly. On October 4, Rospotrebnadzor said special measures were carried out in connection with a case of illness of an institute employee, diagnosed as pneumonia of unknown etiology, that no microorganisms connected to her professional activity were found in her material, and that no emergency situations were found at the institute. The U.S. State Department said it was aware of reports of a fatal case of suspected pneumonic plague and that many details have not been confirmed. As of October 5, 2026, we did not find a laboratory result identifying the cause of the patient's illness announced by any official or a report of a second patient. On October 5, Governor Kobzev wrote that the cause of her death was pneumonia of unknown etiology, and the World Health Organization told Newsweek that no cause of death had been officially confirmed. The disputed claim is whether plague caused her illness and reported death.