Russia places contacts under observation after lab worker dies of unknown pneumonia

Russian plague

Igor Kobzev, governor of Russia’s Irkutsk region, said all identified contacts linked to a suspected “particularly dangerous infection” had been placed under medical observation, with none showing signs of illness and laboratory tests returning negative results.

The statement came as authorities continued quarantine and screening measures around a laboratory worker who died after developing pneumonia of “unknown” origin, while officials and international health agencies said it remained unclear whether the illness was connected to plague or to her work.

Worker died after illness of unknown origin

The worker was identified in local media as Darya Shipilova, a 28-year-old laboratory technician at the Irkutsk Research Anti-Plague Institute of Siberia in the town of Shelekhov.

The institute is dedicated to studying plague and other infectious diseases and is described as a major public health facility responsible for monitoring and preventing outbreaks of high-risk bacterial and viral infections across Siberia and Russia’s Far East.

Shipilova became ill at work and died two days later, on the night of 2 October, at a regional hospital in the nearby town of Shelekhov, according to The Guardian.

It remains unclear how she became unwell.

Rospotrebnadzor, Russia’s agency responsible for infectious disease control, said she had died after being diagnosed with pneumonia of “unknown” origin.

The agency also said that tests had found no micro-organisms associated with the employee’s professional duties in samples taken from her.

Rospotrebnadzor described the “sanitary and epidemiological” situation in the area as stable.

The agency has played down the connection between Shipilova’s death and her work at the anti-plague institute.

Unconfirmed reports in Russian media have suggested that Shipilova may have been infected after a mishap at the laboratory, but officials have not publicly confirmed that account.

Local reports have also described the institute as being locked down after her death.

A relative identified as Roman told the news portal Siberia.Realities that staff had been isolated inside the building since Friday, with more than 60 people affected.

He said family members were allowed to leave food at a checkpoint while tests were being conducted inside the institute.

CNN reported that all of Shipilova’s recent contacts were being tested and examined, while Maxim Modin, the mayor of the Shelekhovsky district, said there had been no cases of infectious diseases among institute staff during the previous 10 days.

Quarantine measures spread across the region

The inpatient facility at the hospital where Shipilova was treated was placed under quarantine, according to Modin.

Several departments at that hospital stopped discharging or admitting patients, he said.

Other hospitals in the region were also closed, according to local media reports.

The US-funded Radio Free Europe/Radio Liberty reported that several hospitals in Irkutsk had been placed under quarantine.

It also reported that staff from the Irkutsk Anti-plague Research Institute of Siberia and the Far East had been kept inside the institute since 2 October.

Patients at Irkutsk city clinical hospital No 1 and the Ivano-Matreninskaya children’s hospital said relatives were not being allowed to visit and people inside were not permitted to leave.

Local residents described additional precautions on social media.

Ulyana Gavryunina, who went to one of Irkutsk’s main maternity hospitals for a routine check-up on Monday, said doctors refused to allow her mother inside because of a quarantine imposed over the suspected plague case.

Gavryunina said a staff member checked her for flu-like symptoms and asked her to complete a screening form for infections on which “plague” was listed.

She posted a photograph of the form on Instagram.

The reports indicate that precautionary measures were being applied even though a diagnosis of plague had not been confirmed.

Authorities in the nearby city of Baikalsk briefly urged residents to avoid travelling to Shelekhov and surrounding settlements because of unofficial information about a possible plague infection.

That post was later deleted from social media.

Irkutsk authorities also cancelled the annual community clean-up event that had been scheduled for the weekend.

Local media linked the cancellation to the incident.

Several public events in Irkutsk were cancelled over the weekend, according to The Guardian.

The aluminium plant near the laboratory instructed its staff to wear masks as a precautionary measure.

The director of the Irkutsk aluminium smelter, identified by The Guardian as Artyom Fominykh, called the mask requirement preventive and said, “Better safe than sorry.”

CNN identified the plant director as Artem Fominikh and reported that he had noted “conflicting reports” were circulating and called for calm.

Officials issue different accounts

The response has been accompanied by differing public statements about whether the worker may have died from plague.

Alexei Tsydenov, head of the neighbouring republic of Buryatia, initially wrote that Shipilova had died of plague before editing his post to say she had “possibly” died of the disease.

CNN reported that Tsydenov had earlier said the employee had died “possibly from the plague”, while also noting that there had been no outbreak of the disease in his region.

Rospotrebnadzor has not confirmed that diagnosis.

Instead, the health watchdog has referred to pneumonia of unknown aetiology and said that tests found no micro-organisms linked to Shipilova’s professional work.

The Kremlin urged the public to rely on official information from Rospotrebnadzor rather than rumours or speculation.

Kremlin spokesman Dmitry Peskov said, “One should rely on official statements from Rospotrebnadzor rather than listening to various rumors and speculation.”

Kobzev said Anna Popova, the head of Rospotrebnadzor, travelled to Irkutsk on Friday.

Popova, who is also Russia’s chief sanitary doctor, attended an extraordinary meeting of the regional sanitary and anti-epidemic commission.

The meeting concerned what officials described as a suspected case of a “particularly dangerous infection affecting a resident of the region”.

Kobzev urged residents to remain calm after meeting Popova to coordinate the response.

In his Telegram statement, Kobzev said all identified contacts had been placed under medical observation and that laboratory tests had returned negative results.

He did not refer to reports that a laboratory worker had died.

The institute where Shipilova worked told CNN by phone that it was not commenting on the incident.

US and WHO monitor the case

US Secretary of State Marco Rubio said the United States was watching the situation closely.

Speaking on Monday before leaving for a trip to Europe, Rubio said, “We’re watching and monitoring it closely.”

He also said, “I don’t think it’s cause for alarm, but it is cause for focus and a cause just to keep an eye on it.”

CNN reported that Rubio said the concern was based on information released by Russian authorities and that it appeared a laboratory worker had become infected, raising concern that the disease may have spread internally.

He added that travel between the United States and Russia was very limited.

The US State Department said it was aware of the possible death from pneumonic plague in Russia.

A spokesperson said, “We are monitoring the situation closely with the CDC and our other interagency partners.”

The spokesperson added, “Many details have not been confirmed.”

The United States encouraged Russian authorities to share accurate information quickly and openly.

The World Health Organization told CNN that it was in contact with Russian health authorities.

The WHO said it was seeking to “verify the event, its circumstances, the laboratory tests underway, and their results.”

Based on unofficial information available to it, the WHO said the public health risk to the general population appeared to be low.

The assessment came while Russian authorities were continuing to investigate the circumstances of the death and monitor people who had been in contact with the worker.

Neighbouring countries add safeguards

Several countries in the region introduced precautionary measures despite the reassurances from Russian authorities and the WHO’s preliminary assessment.

Kazakhstan’s Ministry of Health said the risk was “very low”, but that the situation was being monitored.

The ministry said “sanitary and quarantine controls were implemented at state border crossing points.”

Uzbekistan said it had “increased the readiness” of relevant authorities to respond to highly infectious diseases.

Kyrgyzstan, which does not share a land border with Russia, announced on Monday that it was introducing quarantine controls at state border crossing points.

Kyrgyzstan is some 1,500 miles from Irkutsk, according to CNN.

Alexander Chepurnov, a virologist in Siberia, told CNN that the strict protocols being followed were designed to prevent onward spread.

He described the measures applied after a suspected exposure.

“After any suspected exposure, staff are instructed to immediately report it, decontaminate, undergo medical assessment and be isolated in a separate dedicated facility for however long they might be infectious,” he said.

The precautions reflect concern about the possibility of transmission while officials continue to determine what caused Shipilova’s illness.

They do not, however, establish that the death was caused by plague.

What is known about pneumonic plague

Pneumonic plague is one of three forms of plague caused by the bacterium Yersinia pestis.

The other two forms typically spread through contact with infected fleas, animals or infected tissues.

Angela Rassmussen, a virologist at the Vaccine and Infectious Disease Organization, told CNN that pneumonic plague is deadly but not very transmissible.

She said a person would have to be exposed to a high bacterial load to become sick.

Rassmussen said pneumonic plague is unlike respiratory illnesses such as COVID.

She also said plague is endemic among wildlife in parts of Siberia.

Plague remains endemic in parts of Siberia and the Russian far east, where the bacterium persists naturally among wild rodents and their fleas.

Human cases in Russia are rare.

Before the suspected Irkutsk case, Russia’s last recorded human infection was in 2016.

That infection involved a 10-year-old boy in Siberia’s Altai Republic who contracted plague after helping butcher a marmot.

The World Health Organization says plague has a high fatality rate but can be treated easily with antibiotics if it is detected early.

The US Centers for Disease Control and Prevention says patients with pneumonic plague develop fever, headache and weakness.

The CDC also describes “a rapidly developing pneumonia with shortness of breath, chest pain, cough, and sometimes bloody or watery mucous.”

The presence of these symptoms in medical guidance does not indicate that Shipilova had pneumonic plague.

The available reports only establish that she was diagnosed with pneumonia of “unknown” origin and that officials were investigating a suspected dangerous infection.

Experts assess the risk

Gennady Onishchenko, a former head of Rospotrebnadzor, said the infection in the Irkutsk region was “most likely not the plague”.

He added that even if plague were confirmed, “there will be no spread of this disease”.

Onishchenko told the state news agency TASS that the onset of cold weather would likely prevent transmission.

Prof Ian Jones, a professor of virology at the University of Reading in the United Kingdom, said the case appeared to be a rare laboratory accident and was unlikely to spread much further.

His assessment was based on the reports that the contacts of the primary case were known and could be treated if they showed signs of infection.

“Although it is true that pneumonic plague is directly transmissible, the contacts of the primary case are known and can be treated if they show any sign of infection,” Jones said.

He added that plague carried “a huge history” and was still present in many parts of the world, including Russia.

But he said the living conditions associated with earlier outbreaks were no longer generally present, antibiotics were available and the disease’s potential was therefore limited.

The assessment from Jones is consistent with the WHO’s statement that the risk to the general population appeared low based on unofficial information available at the time.

It also contrasts with the anxiety created by reports of a possible laboratory exposure and quarantine measures at hospitals and the institute.

Residents report anxiety and limited visible change

Residents in the area described concern despite the absence of obvious changes in daily life.

Ekaterina, a resident of Shekelov, told CNN that there were no visible changes in the city but that local people were anxious.

“My acquaintances are slightly panicking,” she said.

Another resident, who wished to remain anonymous, said he was “shocked” by the news.

Elena Trifonova, a journalist with People of Baikal, an exiled Russian media outlet specialising in Siberia, said residents were worried and angry about the lack of information.

“There are no obvious changes to daily life on the streets, but people are worried and anxious. Locals are angry that they are not being told anything,” she said.

Unofficial reports, including one by the independent regional news outlet Liudi Baikala, said nearly 200 people were under observation.

The reported figure was not presented as an official confirmation.

Official statements instead said identified contacts were being placed under medical observation and that tests had returned negative results.

The difference between the unofficial reports and the official statements has contributed to uncertainty around the scale of the response.

The Kremlin has said that people should not rely on rumours and should follow updates from Rospotrebnadzor.

Institute’s role adds to scrutiny

The institute employs around 95 researchers, according to information on its website.

Its work includes monitoring and preventing outbreaks of high-risk bacterial and viral infections across Siberia and Russia’s Far East.

That role has made the circumstances of a worker’s death especially significant, even though Rospotrebnadzor said it had found no micro-organisms associated with her professional duties in her samples.

The reported lockdown of the institute and the testing of staff and recent contacts have focused attention on whether the illness could have been acquired at the facility.

Officials have not publicly confirmed the reported laboratory mishap.

They have also not confirmed that Shipilova died from plague.

The available information therefore separates three issues: the confirmed death, the unconfirmed cause of the pneumonia and the precautionary measures imposed while contacts are assessed.

Those measures include quarantine, medical observation, laboratory testing, restrictions on hospital movement and border controls in neighbouring countries.

Plague’s long history

The disease has affected human populations for thousands of years.

The oldest known evidence of plague reveals its deadly impact 5,500 years ago.

Its continued presence in wildlife in parts of Siberia means that the bacterium is not unknown in the region.

At the same time, the rarity of human infections in Russia and the availability of antibiotics are part of the context cited by experts assessing the current risk.

Before the suspected case in Irkutsk, the last recorded human infection in Russia was in 2016.

That history explains why the reported death at an anti-plague institute has prompted scrutiny, while it does not by itself confirm a wider outbreak.

As of the latest statements cited, authorities were still monitoring contacts, investigating laboratory results and maintaining precautionary measures.

The cause of Shipilova’s illness remained undisclosed, and the suspected link to plague or to her work had not been confirmed.