A lab technician in Russia has possibly died of the plague. Here’s what to know about the infectious disease.

Russian authorities and Trump administration officials are monitoring a possible pneumonic plague outbreak in Russia, after a laboratory worker died of an undisclosed illness. The woman, in her late 20s, reportedly worked at the Irkutsk Anti-Plague Research Institute of Siberia and the Far East and died of pneumonia of unknown origin, according to Rospotrebnadzor, a Russian health and consumer protection agency. The research institute is located in Irkutsk Oblast. Russian authorities have quarantined dozens of people, while the head of Russia’s health watchdog flew to the area, Reuters reported Monday. Individuals with pneumonic plague develop fever, headache, weakness and a “rapidly developing” pneumonia characterized by shortness of breath, chest pain, cough and sometimes bloody or watery mucus, according to the Centers for Disease Control and Prevention (CDC). “Pneumonic plague develops when bacteria spread to the lungs of a patient with untreated bubonic or septicemic plague, or when a person inhales infectious…