Russia plague news: What to know about the disease and which countries have been affected as lab worker dies in Siberia?

Russia pneumonic plague: Reports of a suspected plague case in Siberia have put fresh attention on a disease that still exists in parts of the world. A woman working at an anti-plague research institute near Irkutsk reportedly became seriously ill and later died. Russian authorities have not publicly confirmed that plague caused her death, but the reports have led to medical monitoring and other precautionary steps in the region. At the same time, a new World Health Organization map shows where human plague cases were reported between 2019 and 2025.

Russia Pneumonic plague

The woman, identified by Russian-language outlet People of Baikal as 28-year-old Daria Shipilova, worked at the Irkutsk Anti-Plague Research Institute. Russian media reported that she told colleagues she had accidentally broken a test tube containing live bacteria while collecting samples. She later developed severe pneumonia, was hospitalized in Shelekhov and died, as per a report by Newsweek.

The exact cause of death remains disputed. Rospotrebnadzor has said there were no accidents involving pathogenic microorganisms at the institute, while reports from Russian media have linked the illness to possible plague exposure. Current reporting continues to describe the case as suspected rather than officially confirmed.

Reports also said nearly 200 people who may have been in contact with the woman were placed under medical observation. Several hospitals in the Irkutsk area were reported to have introduced quarantine measures, while public events were canceled.

Buryatia’s regional head, Alexei Tsydenov, also pushed back against reports that the woman had contracted the disease after visiting the republic. “The source of infection stems from circumstances unrelated to Buryatia,” he posted on VK.

The situation has prompted questions because officials have not publicly confirmed plague as the cause of death.

What does the WHO plague map show?

The WHO says plague is caused by the bacterium Yersinia pestis. It can circulate among animals and can sometimes infect people. There are three main clinical forms: bubonic, pneumonic and septicaemic plague.

The pneumonic form affects the lungs and is the form that can spread between people through respiratory particles. That has made reports of a possible pneumonic case in Siberia particularly concerning.

The WHO's latest data give a wider picture of where the disease has been reported. Between 2019 and 2025, 10 countries reported suspected human plague cases to the WHO. Six reported confirmed cases. There were 3,847 suspected cases and 423 deaths reported during that period.

The WHO says plague as an animal disease exists on every continent except Oceania. Human cases have been reported in Africa, Asia and South America. Since the 1990s, Africa has recorded most human plague cases, especially in the Democratic Republic of the Congo and Madagascar. The WHO also notes that plague may exist in countries that do not report human cases, reported Newsweek.

The latest WHO information stresses the importance of watching animal populations and responding quickly when outbreaks occur.

What is pneumonic plague and how does it spread?

Pneumonic plague is one of the forms of plague caused by the bacterium responsible for bubonic plague. Unlike bubonic plague, which is usually associated with swollen lymph nodes after infection, pneumonic plague affects the lungs. The World Health Organization says it is the most virulent form of plague and can trigger severe epidemics, as per NBC News and The Guardian.

The disease can spread from person to person through respiratory droplets, including those produced when an infected person coughs or sneezes.

But experts say that does not automatically mean a suspected case will become a large outbreak.

Dr. Ashish Jha, who served as the White House Covid-19 response coordinator from 2022 to 2023, said it is “actually very hard” for pneumonic plague to spread from person to person.

“If this is an isolated case of pneumonic plague and no one else dies, “it will probably end there,” he told NBC News.

He also said that while a few more infections could occur, the chances of the situation becoming a major outbreak or global pandemic were “exceedingly low.”

Pneumonic plague can be serious, but it is treatable. Medical experts say rapid treatment with powerful antibiotics is important because delays can increase the risk of death.

Why is the Russian case drawing attention?

The reported death has raised concern because of the woman's work at a plague research institute and the claims surrounding a broken test tube. Russian media reports have described additional measures in Irkutsk. The People of Baikal outlet reported that hospitals were placed under quarantine restrictions, while REN TV reported that people who may have had contact with the woman were being monitored.

The Irkutsk Aluminum Smelter also introduced a mask requirement, according to a statement from its director. The statement said Rospotrebnadzor was carrying out anti-epidemic measures without directly confirming a plague outbreak.

Authorities have also reportedly opened a criminal investigation into possible health safety violations.

The key point is that the reported Russian case remains under investigation. The WHO data show that plague is still reported in parts of the world, but the Siberian incident should not be treated as a confirmed plague outbreak unless Russian health authorities establish that diagnosis.

FAQs

Is plague confirmed in Russia?
No. Russian authorities have not confirmed it caused the death.

Where is plague still reported?
Most recent human cases have been reported in Africa, especially the Democratic Republic of the Congo and Madagascar.