BBC News: Plague deaths: Quarantine lifted after couple die of bubonic plague
“A quarantine imposed in Mongolia after two people died from the bubonic plague has been lifted, allowing a number of tourists to leave the area. The Mongolian couple contracted the illness after eating the raw meat of a marmot, a type of rodent…” (5/7).

NPR: Bubonic Plague Strikes In Mongolia: Why Is It Still A Threat?
“…This is the same illness that killed an estimated 50 million people across three continents in the 1300s. Nowadays, the plague still crops up from time to time, although antibiotics will treat it if taken soon after exposure or the appearance of symptoms. Left untreated, the plague causes fever, vomiting, bleeding, and open, infected sores — and can kill a person within a few days…” (Schreiber/Bichell, 5/7).

Washington Post: A couple ate raw marmot believed to have health benefits. Then, they died of the plague.
“…The decision to impose the quarantine came after officials became worried that the husband and wife had developed pneumonic plague, which can be swiftly passed to other people through airborne droplets, [Ariuntuya Ochirpurev with the World Health Organization in Ulaanbaatar] said. Pneumonic plague is the ‘most serious form of the disease’ and the only type that can spread from person to person, according to the CDC. If left untreated, cases of the plague have a 30 to 100 percent fatality rate, the WHO said…” (Chiu, 5/8).