Russia's Mystery Infection: Did A Lab Accident Trigger A Health Scare?

A laboratory accident at a Russian anti-plague institute has triggered alarm after a 28-year-old researcher died from severe pneumonia of unknown origin. Reports suggest she may have been exposed to a pneumonic plague pathogen after a test tube broke, though authorities have not confirmed the diagnosis. With nearly 200 contacts under medical observation, the show examines what happened inside the Siberian lab, the risks of pneumonic plague, and why the incident has raised global concerns.