Siberia plague scare: pneumonic plague case suspected after researcher's death

The death of Russian researcher Daria Shipilova in Siberia has raised concerns about pneumonic plague, a severe contagious form of the disease caused by Yersinia pestis, with nearly 200 people placed under health observation and quarantine measures activated. The 28-year-old may have contracted the infection after accidentally breaking a test tube containing the pathogen in her laboratory in the Irkutsk region, though Russian authorities have not confirmed a diagnosis of pneumonic plague. Pneumonic plague is the most epidemic-prone form of the disease, transmitting person-to-person through air or aerosols. It has an incubation period of one to three days, causing acute pneumonia with cough, breathing difficulties, and potentially bloody sputum, requiring rapid antibiotic treatment within 24 hours of symptom onset.