Researcher Dies in Siberia After Possible Plague Exposure; 200 Quarantined

A researcher at a Siberian lab has died after potential exposure to pneumonic plague, prompting nearly 200 people to be placed under quarantine and alerting global health officials. The incident occurred in Russia, where the researcher may have contracted the highly infectious bacterial disease. Authorities have quarantined close contacts to prevent any potential spread, while international health monitoring has been heightened. Pneumonic plague is a severe form of plague affecting the lungs, transmissible between humans. The case underscores ongoing biosafety concerns at research facilities handling dangerous pathogens, though no wider outbreak has been reported.