An unsettling incident has surfaced in southeastern Russia involving the passing of a 28-year-old woman due to pneumonia, sparking concerns that she might have been exposed to a variant of plague at her workplace laboratory.
The specific plague in question is pneumonic plague.
Official information is limited. Russian authorities have stated that there is currently no proof linking the illness to any pathogens the woman handled at the Irkutsk Anti-Plague Research Institute of Siberia and the Far East.
Nevertheless, speculation arose when a neighboring region’s governor posted on Telegram suggesting the woman died from plague, later amending his statement to include uncertainty.
Following her demise last week, individuals have been isolated at the hospital where she was treated. Many others who had contact with her are under medical observation, according to Anna Popova from Russia’s public health agency.
There are concerns regarding the transparency of Russian authorities, along with astonishment at the concept of someone succumbing to an ailment associated with the Middle Ages — a disease many are unaware still exists.
Here’s what is known and unknown regarding the circumstances in Irkutsk, the deceased lab worker, and the statements made by Russian and other global officials regarding the incident.
**Incident Details:**
According to TASS, the employee was diagnosed with an unspecified pneumonia. Local media reports identify her as laboratory technician Darya Shipilova, who passed away on a Friday.
The lab, founded under the former Soviet Union in 1934, conducts scientific research on plague control, vaccine development, epidemic prevention, and other hazardous infectious diseases like cholera, brucellosis, and anthrax.
**Pneumonic Plague Overview:**
Plague, famously known as the Black Death during its devastation in Europe in the 1300s, is an infectious disease caused by the bacterium Yersinia pestis. It is transmitted by small mammals and primarily spread by fleas that feed on them.
The disease has three forms: bubonic, septicemic, and pneumonic.
Bubonic plague, the most prevalent type, results in painful, swollen lymph nodes near the flea bite site. Symptoms usually manifest within three to seven days and can include fever, chills, headache, and extreme fatigue.
Septicemic plague develops when untreated bubonic plague spreads to the bloodstream and other body parts, causing severe complications.
Pneumonic plague occurs when Y. pestis infects the lungs, posing a greater risk as it can be transmitted between individuals through airborne droplets. Symptoms, including high fever, cough, bloody coughing, and breathing difficulties, can appear within one to three days and can be fatal if untreated.
**Mortality Rate and Treatment:**
Plague is effectively treated with antibiotics, a luxury unavailable during the Black Death. Although deaths still occur, they are typically limited to specific geographic regions, often due to factors attracting rodents or the remoteness of certain areas.
Between 2019 and 2025, the WHO recorded 3,847 suspected cases and 423 deaths in ten countries, with a significant portion in the Democratic Republic of Congo and Madagascar.
**Global Response:**
Russian officials aim to allay fears of a potential outbreak. Meanwhile, countries like Kazakhstan have heightened alertness, with some enforcing border quarantines.
The WHO is in contact with Russian health authorities, offering assistance if required. U.S. President Donald Trump has pledged support, emphasizing the seriousness of the situation.
Health Canada is monitoring the situation cautiously, affirming no current risk to Canada. The last recorded human plague case in Canada dates back to 1939.
