U.S. Embassy warns Americans to leave Russia while suspected pneumonic plague death triggers quarantines in Siberia

Irkutsk, Russia: The U.S. Embassy is aware of press reports from the Irkutsk region of suspected pneumonic plague resulting in the death of an individual and of associated quarantine measures in, and closures of, hospitals in Irkutsk. We continue to track the situation closely. The U.S. government has limited ability to help U.S. citizens in Russia, especially outside of Moscow. The State Department’s Level 4 Travel Advisory (Do Not Travel) for Russia remains in place and states U.S. citizens currently in Russia should depart immediately. U.S. citizens planning travel to Russia are again strongly advised not to travel to Russia due to risk of wrongful detention and security concerns. More at: https://ru.usembassy.gov/health-alert-u-s-embassy-moscow-russia-october-6-2026/

Key detail: plague isn't confirmed. A 28-year-old worker at Irkutsk's anti-plague institute died of pneumonia of unknown cause. Russia told WHO there's no plague case, and none found in her contacts so far. Pneumonic plague does spread person to person, but early antibiotics…

— The Nuntheia (@thenuntheia) October 6, 2026

The Irkutsk lab roots go back to 1923, when an anti-plague laboratory was set up in Irkutsk. By 1934 it had become the Anti-Plague research institute for Siberia. For decades it worked on plague in Siberia, Transbaikalia and Mongolia, including natural plague areas and Yersinia… pic.twitter.com/s2X1jgWyuX

— Bhavya Trivedi (@BhavyaInsight) October 6, 2026