Rumors circulating online claim that a laboratory assistant in Russia died of plague infection after breaking a test tube; nearly 200 people have been placed under medical observation. What information is worth noting?

I. Timeline details as of 4 October Beijing Time: ・ Deceased: Daria Shipilova, 27, a laboratory technician at the Irkutsk Antiplague Research Institute of Siberia and the Far East. ・ 25 September: Broke a test tube containing a plague bacterial strain in the laboratory (she only reported the incident on 29 September, when her condition had already severely deteriorated). ・ 29 September: Admitted to the Shelikhov District Hospital due to severe pneumonia symptoms; subsequently placed on mechanical ventilation. ・ 1–2 October (early morning): Died. According to media reports, cause of death was pneumonic plague. ・ 2 October: 189–197 close contacts placed under quarantine and medical observation (some hospitalized; 12 transferred back to the antipLAGUE research institute); the inpatient department of Shelikhov Hospital sealed off; Governor Igor Kobzev of Irkutsk Oblast held an emergency meeting with Anna Popova, head of Russia’s Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor). ・ To date: No symptoms observed among contacts; laboratory tests yielded negative results. Local authorities have canceled certain public events and launched comprehensive epidemic prevention measures; an official investigation into possible safety violations has reportedly been initiated. II. Two prevailing hypotheses—neither officially confirmed—remain under investigation: 1. Laboratory leak hypothesis: The deceased reportedly told medical staff she had broken a test tube containing live plague bacteria; multiple Russian media outlets have adopted this account. 2. Border exposure hypothesis: She had reportedly undertaken work-related travel to Buryatia—a region bordering Mongolia where natural plague foci exist. However, Alexey Tsydenov, Head of the Republic of Buryatia, has publicly denied this, stating that the deceased never visited Buryatia and that no plague cases have recently occurred there.

A Russian researcher is suspected to have died from plague infection; nearly 200 people have been quarantined. Is there a risk of outbreak spread?

On 6 October, WHO spokesperson Tarik Jašarević (Lindmeier) stated that, based on currently available information, WHO’s preliminary risk assessment estimates the risk to be moderate to low for Irkutsk, low for the Russian Federation as a whole, and very low for the WHO European Region. Mr. Lindmeier stated that WHO's initial risk assessment from the information available “estimates the risk to be moderate to low for Irkutsk, a low risk for the Russian Federation as a whole and very low for the WHO European region”.

Russia and World Respond to Possible Pneumonic Plague Case After Lab Worker Death

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WHO states low risk of spread following the death of a lab worker in Russia; Russian officials report stable situation with no plague detected among traced contacts.

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2026-10-07

Russia and World Respond to Possible Pneumonic Plague Case After Lab Worker Death

Russia and World Respond to Possible Pneumonic Plague Case After Lab Worker Death

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