Suspected plague case in Russia, WHO seeks clarification from Moscow

The World Health Organization has requested additional information from the Russian Federation on a suspected case of pneumonic plague, following the death, on October 2, 2026, of a 28-year-old laboratory worker employed at the Irkutsk Anti-Plague Research Institute. The woman had been hospitalized for a severe form of pneumonia. International health authorities also report the possibility of a second case, which has yet to be confirmed.

The request for clarification falls within the standard procedures set out in the International Health Regulations, the instrument that requires member states to notify WHO of events that could constitute a public health emergency of international concern and to provide follow-up data when requested.

According to Russia, no plague cases have been recorded in the Irkutsk oblast in the recent period prior to this episode, and around 200 people who had contact with the researcher have been placed in quarantine as a precautionary measure. At this stage, these are statements attributed to Russian authorities and not data verified by a third-party source: WHO has not yet released an independent assessment of the situation.

It should be noted that the news currently comes from a single source (Sky TG24); no independent confirmation is available at this time. It is not currently possible to establish whether the second case mentioned has been confirmed, nor to know the outcome of the request for clarification sent from Geneva to Moscow.

The institute involved, which specializes in the study of plague and other diseases caused by high-risk pathogens, has not issued any public statements reported by the available source. The number of people in quarantine, around 200, remains to date the only quantitative figure released on the handling of the case in the Irkutsk oblast.