Fill in the blank in the quiz: A plague research employee in Russia died from ____

A 28-year-old laboratory assistant named Darya Shipilova died in early October after reportedly breaking a test tube containing potentially dangerous pathogens at the Irkutsk Anti-Plague Research Institute in Shelekhov, Russia. Despite extensive speculation that she may have contracted pneumonic plague, Russian authorities continue to maintain that her death was due to pneumonia of unknown origin and have not identified the specific pathogen involved. At least 197 people who had close contact with Shipilova were placed under quarantine or surveillance, while international health organizations like the CDC remain vigilant but assert that the risk to other countries is minimal. The incident has sparked concerns about Russia's transparency regarding biological research and safety protocols at such facilities.