Nearly 200 people in Irkutsk were placed under medical observation after Daria Sh., an employee of the Irkutsk anti-plague institute, died from Pneumonic plague. She had been hospitalized in Shelekhov on Tuesday with symptoms of severe pneumonia, placed on a ventilator, and died on Thursday.
At least 197 people who may have had contact with Daria Sh. were placed under medical isolation, including more than 100 in hospital wards. Igor Kobzev said all identified contact persons had been placed under medical observation and that their laboratory test results were negative as of Friday.
Shelekhov district hospital quarantine
The Shelekhov district hospital was placed under quarantine pending review by a special commission. Authorities also canceled planned public events in Irkutsk, a sign that the response moved beyond the hospital floor and into the wider city as officials tried to limit any further exposure.
Daria Sh. reportedly told medical staff that she had accidentally broken a test tube containing live bacteria while collecting samples for testing. That detail sits uneasily beside the way the illness was first described: Irkutsk officials initially called it only a particularly dangerous infection, while media reports later described it as pneumonic plague, the form that affects the lungs and can spread between people through respiratory droplets.
Irkutsk and Buryatia response
Alexei Tsydenov said, "There are no plague outbreaks in the republic, including in areas bordering Mongolia," after the Irkutsk case drew attention in neighboring Buryatia. The statement matters because the contact-tracing net now extends beyond one hospital and one region’s internal review, while law enforcement reportedly opened a criminal investigation into potential health safety violations resulting in death.
For anyone identified as a contact, the practical picture is already set: medical observation has begun, hospital isolation has been used for more than 100 people, and Friday tests were negative for those already reached. The special commission’s review of the quarantined Shelekhov district hospital is the next formal step, and it will be the moment when investigators start separating an accident in a testing setting from a wider chain of exposure.
