Archive · 5 Oct 2026
Siberian Lab Worker Dies Amid Suspected Plague, Contacts Monitored
A laboratory worker in Siberia became very sick with pneumonia and died on October 2.
Russian media identified her as Daria Shipilova, who was 28.
Some officials and reports linked her death to plague, but the health watchdog described her illness as pneumonia of unknown cause.
The exact cause of her illness has not been confirmed.
Reports offered two possible explanations: a broken tube containing bacteria or a work trip to Buryatia.
Neither explanation has been confirmed by authorities.
Nearly 200 people who may have been in contact with her were placed under observation.
Their first tests were reported negative, and no symptoms were found among identified contacts.
A microbiologist reportedly questioned whether a broken tube would likely have caused an infection.
Authorities said the regional health situation remained stable.
A 28-year-old laboratory worker, identified in Russian media as Daria Shipilova, died on October 2 after being hospitalized with severe pneumonia.
Nearly 200 people who may have had contact with her were placed under medical observation; initial tests were reported negative, with no symptoms detected among identified contacts.
Rospotrebnadzor described her illness as pneumonia of unknown cause, while Buryatia head Alexei Tsydenov said she died of plague; the official diagnosis remains unconfirmed as plague.
Reports suggested she may have broken a test tube containing live bacteria, or may have become ill after a work trip to Buryatia; neither account has been confirmed as the infection source.
Microbiologist Mikhail Favorov reportedly questioned the broken-test-tube explanation, while authorities said the sanitary and epidemiological situation remained stable.
- Who
- A 28-year-old laboratory worker identified in Russian media as Daria Shipilova; nearly 200 possible contacts were monitored.
- What
- She died after severe pneumonia; some accounts linked her death to plague, while the official diagnosis reported was pneumonia of unknown cause.
- When
- She died on October 2; the year is not specified in the articles.
- Where
- Shelekhov, in Russia’s Irkutsk region; she worked at the Irkutsk Anti-Plague Institute.
- Why
- The cause and source of her infection remain unclear; reports mentioned possible exposure to bacteria or a work trip to Buryatia, but neither has been confirmed.
Official Caution and Uncertainty
Plague Claims and Exposure Concerns
Cause of death
Official Caution and Uncertainty
Rospotrebnadzor reported pneumonia of unknown cause, and the source articles say the official diagnosis did not confirm plague.
Plague Claims and Exposure Concerns
Buryatia head Alexei Tsydenov said the woman died of plague, and media reports described suspected pneumonic plague.
Possible infection source
Official Caution and Uncertainty
Authorities have not confirmed how she became infected or verified either reported account.
Plague Claims and Exposure Concerns
Reports said she may have broken a tube containing live bacteria or become ill after a work trip to Buryatia.
Broken-tube explanation
Official Caution and Uncertainty
The account that she broke a test tube has not been officially confirmed as the source of infection.
Plague Claims and Exposure Concerns
Microbiologist Mikhail Favorov reportedly dismissed the explanation, saying infection from a broken tube would be unlikely for someone working at an anti-plague institute.
- Age
- 28
- Date of death
- October 2; year not specified
- Workplace
- Irkutsk Anti-Plague Institute in Shelekhov
- Official diagnosis reported
- Pneumonia of unknown etiology
- Possible contacts
- Nearly 200 people were placed under medical observation
- Contact checks
- Initial tests were reported negative; no symptoms were detected among identified contacts
- Possible exposure accounts
- A broken test tube containing live bacteria, or illness after a work trip to Buryatia; neither account was confirmed
- Regional assessment
- Authorities described the sanitary and epidemiological situation as stable
