What happened
A suspected outbreak of pneumonic plague in Russia has raised concerns among scientists and health officials worldwide. A 28-year-old laboratory worker at the Irkutsk Anti-Plague Institute in Russia died after accidentally breaking a test tube containing live Yersinia pestis, the bacterium that causes plague.
Nearly 200 people are under medical observation, and five hospitals in the region have been quarantined. The Kremlin's health agency has described the outbreak as
