Onishchenko tells TASS the patient came back from Buryatia and the plague carriers are asleep
Gennady OnishchenkoFormer head of Rospotrebnadzor and member of the Russian Academy of Sciences, in remarks to TASS
Gennady Onishchenko, a former head of Rospotrebnadzor, told TASS on October 2, 2026, according to TASS's Telegram post, that the patient had returned from Buryatia, that the natural plague reservoir there is rodents and fleas, and that the natural foci are under constant control but all the plague carriers are already asleep. In its own words TASS summarized the remarks as saying the infection identified in the Irkutsk region is most likely not plague and that, even if confirmed, the disease would not spread in Russia. The same day, Tsydenov wrote, citing Rospotrebnadzor and the Buryatia government, that the woman had not come to Buryatia.
Responding to
The patient returned from Buryatia, where rodents and fleas are the natural plague reservoir, Gennady Onishchenko told TASS on October 2, 2026.
“Пациентка вернулась из Бурятии, природным очагом чумы там являются грызуны и блохи. Все эти очаги природные у нас находятся на постоянном контроле, но все носители чумы уже спят”
Interview
Reporting

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, a statement from Irkutsk regional authorities, Rospotrebnadzor or the institute that says she died, or a report of a second patient. The disputed claim is whether plague caused her illness and reported death.
Source and context
Interview
About this source
TASS's post. In its own words TASS says the dangerous infection identified in the Irkutsk region is most likely not plague but that, even if confirmed, the disease will not spread in Russia; it then gives Gennady Onishchenko's direct quotation to TASS. The direct quotation does not itself say the infection is not plague. TASS's article on its website was not accessible to us.
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About this source
A local outlet's chronology. It reports that the Irkutsk administration postponed the citywide cleanup day planned for October 3 for residents' safety because of an unfavorable epidemiological situation, according to the mayor's press service, and it summarizes unconfirmed accounts of the cause. The publication time on the page is not shown; we date it to October 2 from its address.
Archived copy (opens in a new tab)Before the quotation
Governor Kobzev's post at 05:08 UTC had described a suspected case of a particularly dangerous infection without naming it.
After the quotation
Tsydenov denied the Buryatia trip later that day. Rospotrebnadzor's October 4 statement did not address where she had traveled. The remarks pre-date the agency's statement.
How this statement is classified
The label describes this statement's response within the context above.
Why this label?
The reference point is the proposition that the illness of the Irkutsk Anti-Plague Institute employee, reported to have died on October 1 or 2, 2026, was plague. TASS reports that he said the infection is most likely not plague, and his own quoted words tie the season to the carriers being inactive without saying it was not plague, so we used Challenged the characterization. The closest competing label is Denied. It loses because the summary is hedged (most likely) and the direct quotation does not state that it was not plague. Mixed or conditional loses because the clause about confirmation concerns spread of the disease, not the diagnosis.
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More from this case
Read the full caseGovernor Kobzev says the employee died of pneumonia of unknown etiology
“По их результатам сообщается, что в биоматериалах девушки не обнаружено микроорганизмов, связанных с ее профессиональной деятельностью. Причина ее смерти – пневмония неустановленной этиологии.”Read statement
The State Department says it is aware of reports of suspected pneumonic plague and many details are unconfirmed
U.S. Department of State
“We are aware of reports of a fatal case of suspected pneumonic plague in Irkutsk Oblast, Russia. … We are monitoring the situation closely with the CDC and our other interagency partners … Many details have not been confirmed. We encourage Russian authorities to share accurate information quickly and openly.”Read statement
Governor Kobzev repeats the diagnosis of pneumonia of unknown etiology
“Под строгим контролем Роспотребнадзора в регионе проводятся профилактические мероприятия в связи со случаем заболевания сотрудницы Иркутского противочумного института Сибири и Дальнего Востока пневмонией неустановленной этиологии. В материале от больной не выявлены микроорганизмы, связанные с ее профессиональной деятельностью. Среди сотрудников института за прошедшие 10 дней обращений по поводу инфекционных заболеваний не зарегистрировано. Все контактные лица с заболевшей установлены, обследованы и находятся под медицинским наблюдением с ежедневными лабораторными исследованиями.”Read statement
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- The Dispute Index
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- Onishchenko tells TASS the patient came back from Buryatia and the plague carriers are asleep
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The Dispute Index. "Onishchenko tells TASS the patient came back from Buryatia and the plague carriers are asleep". First published: 2026-10-05. Last updated: 2026-10-05. https://disputeindex.com/events/4616-gennady-onishchenko-a-former-head-of-rospotrebnadzor-told