A historical plague that reshaped Europe in the 14th century.
A laboratory worker at the Irkutsk Anti‑Plague Institute has died after hospitalisation with severe pneumonia; regional officials have placed the hospital under quarantine and put nearly 200 contacts under medical observation. Authorities and Russia's consumer watchdog have said tests are negative so far; local leaders have cancelled public events.
A 28-year-old technician at the Irkutsk Anti-Plague Research Institute has died after severe pneumonia on Oct. 2. Russian authorities have told the WHO they found no dangerous pathogens in more than 5,000 tests of the worker and roughly 200 contacts, but they have not produced a confirmed diagnosis or released detailed lab results, prompting international requests for transparency.