The U.S. State Department says that it’s monitoring reports of a fatal case of suspected pneumonic plague near southeastern Siberia, in coordination with the CDC. Here’s what we know about the pneumonic plague, how it spreads and how dangerous it is. ↧ What to know about pneumonic plague after woman in Russia dies from... Key details are unknown, including whether the woman, who worked at a lab in Siberia, was infected with plague at all.