Archive · 7 Oct 2026
WHO Says Siberia Plague Risk Is Low After Lab Worker’s Death
A laboratory worker in Siberia died after becoming very sick with pneumonia.
Officials said she did not test positive for plague, and they do not yet know what caused her illness.
Some people who may have been near her were asked to stay apart while health workers checked for infection.
About 60 workers at the institute were among those confined, and reports said around 200 contacts were monitored.
No plague cases have been confirmed in the area or among her contacts, according to the WHO.
The WHO says the risk is higher in Irkutsk than in other places, but remains low overall.
It is watching the situation and has asked for more information.
Darya Shipilova, a 28-year-old laboratory worker in Russia’s Irkutsk region, died on October 2 after developing severe pneumonia.
Russian health authorities said Shipilova did not test positive for plague and that the cause of her pneumonia was unknown.
Around 200 people who may have had contact with her were reportedly placed under medical observation; about 60 institute staff were confined.
The WHO said Russian authorities reported no plague cases in Irkutsk, including among Shipilova’s contacts, and no monitored contacts had developed symptoms.
The WHO assessed the risk as moderate to low in Irkutsk, low across Russia, and very low in the WHO European region.
- Who
- Darya Shipilova, a 28-year-old laboratory worker, and people who may have been in contact with her.
- What
- Shipilova died after severe pneumonia; contacts were monitored and quarantined amid concern about possible plague, but no plague cases were confirmed.
- When
- Shipilova died on October 2; the report was published October 7, 2026.
- Where
- Irkutsk region, Siberia, Russia.
- Why
- Authorities imposed precautionary monitoring and isolation while investigating the cause of her illness and whether any infection had spread.
Initial Plague Concern
Official Findings and WHO Assessment
Possible cause of death
Initial Plague Concern
A regional official initially said Shipilova had died from plague, then revised the wording to “possibly” plague.
Official Findings and WHO Assessment
Russian health authorities said she did not test positive for plague and died from pneumonia of unknown cause.
Laboratory connection
Initial Plague Concern
Her death at an anti-plague research institute raised questions about a possible laboratory-linked infection.
Official Findings and WHO Assessment
Russian health authorities said there was no evidence connecting her illness to her work at the institute.
- Deceased
- Darya Shipilova, 28
- Date of death
- October 2, 2026
- Reported illness
- Severe pneumonia; Russian health authorities said its cause was unknown
- Contacts monitored
- Around 200 people were reportedly placed under medical observation
- Institute staff
- About 60 staff members were reportedly confined at the research institute
- Confirmed plague cases
- None reported in Irkutsk or among Shipilova’s contacts, according to the WHO’s account of information from Russian authorities
- WHO risk assessment
- Moderate to low for Irkutsk; low for the rest of Russia; very low for the WHO European region