Russian authorities said situation was under control and that all known contacts of the dead woman had been identified, examined and placed under medical supervision. Dozens of people were reported to be in isolation after a Russian laboratory worker at an institute dedicated to studying the plague and other infectious diseases died of an undisclosed illness. Key points and original sources are listed below.

• Russian authorities said situation was under control and that all known contacts of the dead woman had been identified, examined and placed under medical supervision.S1

• Dozens of people were reported to be in isolation after a Russian laboratory worker at an institute dedicated to studying the plague and other infectious diseases died of an undisclosed illness. The researcher, a 28-year-old female laboratory technician at the...S2

• A researcher at a lab in Siberia has died after potentially being exposed to pneumonic plague, according to reports. Now, almost 200 people are reportedly under quarantine in the wake of that death, with the incident putting health officials around the world o...S3