# Suspected plague incident in Irkutsk, Russia > Live situation record from CLSTR: https://clstr.news/situations/20261004-suspected-plague-incident-in-irkutsk-russia > Updated: 2026-10-10T12:45:24.000Z. Sources: 1011. Developments: 7. The death of 28-year-old laboratory technician Daria Shipilova in Russia’s Irkutsk region has raised concerns regarding a potential pneumonic plague infection. Reports suggest the infection may have resulted from a laboratory accident on September 25, when Shipilova allegedly broke a test tube containing live Yersinia pestis bacteria at the Irkutsk Anti-Plague Research Institute in Shelekhov. She died between October 1 and October 2 following symptoms of severe pneumonia or acute respiratory failure. Russian authorities, including Rospotrebnadzor and Kremlin spokesperson Dmitri Peskov, have denied an outbreak. Peskov characterized reports of a potential second death as “fake news,” while Rospotrebnadzor stated that over 5,500 tests were conducted without finding dangerous pathogens. Officials maintain the deceased died of “pneumonia of unknown etiology” and have dismissed claims of a laboratory leak, noting the worker was vaccinated. Two commissions investigating biosafety requirements concluded that no incident occurred at the institute. Following the incident, approximately 200 people were placed under medical observation, which led to temporary antibiotic shortages in local pharmacies. Governor Igor Kobzev has since announced the termination of preventive measures, stating the epidemiological situation is stable. International scrutiny remains high. The World Health Organization (WHO) has reported that Russian authorities have officially ruled out plague as the cause of death, though the exact cause remains unknown. The WHO continues to monitor the situation as it awaits further clinical and epidemiological information, noting that the absence of a confirmed diagnosis remains a key uncertainty. Recent reports confirm that testing of those in contact with the worker for high-risk pathogens has returned negative results, identifying only common viral strains such as COVID-19 and rhinovirus, and there is currently no evidence of ongoing transmission. ## Claims - Daria Shypilova, a 28-year-old researcher, died after a laboratory incident involving a plague pathogen in the Irkutsk region. (disputed by 32 sources) - Rospotrebnadzor stated that no laboratory accident involving pathogenic microorganisms was recorded at the institute. (disputed by 25 sources) - Darya Shipilova, a 28-year-old laboratory technician, died in the Irkutsk region. (corroborated by 46 sources) - Approximately 189 to 200 people are currently under medical observation following the incident. (corroborated by 37 sources) - Russian health authorities (Rospotrebnadzor) reported the cause of death as pneumonia of unknown etiology. (corroborated by 31 sources) - Donald Trump announced he plans to speak with Vladimir Putin soon regarding a laboratory death in Siberia. (corroborated by 28 sources) ## Timeline ### 2026-10-10: Russia investigates fatal pneumonia death of laboratory worker in Siberia The WHO is seeking clarity after a Russian lab worker died of unexplained pneumonia in Siberia. While authorities deny a plague outbreak, the lack of a confirmed diagnosis has raised international biosafety'। 35 sources. https://clstr.news/cluster/siberian-anti-plague-lab-death-sparks-biosafety-concerns ### 2026-10-08: Health experts address unconfirmed plague claims in Russia Infectious disease specialist Mino Moharez states there is no official confirmation from scientific or global health authorities regarding recent claims of a plague outbreak in Russia. 2 sources. https://clstr.news/cluster/health-experts-address-unconfirmed-plague-claims-in-russia ### 2026-10-08: Irkutsk Anti-Plague Institute researcher dies of unknown pneumonia A 28-year-old researcher's death in a Siberian plague institute has sparked international concern, though Russian authorities deny any plague outbreak, citing pneumonia of unknown origin after testing 5,000+ de 109 sources. https://clstr.news/cluster/russia-investigates-death-of-laboratory-worker-in-siberia ### 2026-10-07: Russia denies plague outbreak reports in Siberia after lab worker death Russia has denied reports of a plague outbreak in Siberia following the death of a laboratory worker, despite calls for transparency from the WHO and the United States. 5 sources. https://clstr.news/cluster/russia-denies-plague-outbreak-reports-in-siberia-after-lab-worker-death ### 2026-10-05: International health surveillance increases after Russian researcher's death Countries including Kazakhstan, Kyrgyzstan, and Indonesia have increased health surveillance following the death of a Russian researcher from severe pneumonia of unknown origin in Irkutsk. 4 sources. https://clstr.news/cluster/international-health-surveillance-increases-after-russian-researchers-death ### 2026-10-04: Irkutsk lab death sparks international concern over suspected plague The death of a lab technician in Siberia has sparked international concern over a suspected pneumonic plague case. The US and WHO are urging Russia for transparency as authorities monitor 200 contacts. 839 sources. https://clstr.news/cluster/irkutsk-laboratory-worker-death-sparks-plague-concerns ### 2026-10-02: Irkutsk laboratory worker dies of suspected plague in Siberia A 28-year-old Russian lab worker died of suspected pneumonic plague in Siberia after a possible accident. Nearly 200 people are under observation as authorities monitor the situation. 221 sources. https://clstr.news/cluster/irkutsk-laboratory-worker-death-sparks-plague-concerns-in-siberia --- Cite as: Suspected plague incident in Irkutsk, Russia. CLSTR, https://clstr.news/situations/20261004-suspected-plague-incident-in-irkutsk-russia