The United States is monitoring reports of a suspected plague case in eastern Russia after a laboratory worker dies, Secretary of State Marco Rubio says. Rubio tells reporters the situation is being closely watched, and he does not believe there is cause for alarm at this time.
According to the accounts, the concern centers on a death connected to a worker at a plague institute in Siberia. Russian reports cited by outlets describe the worker as developing pneumonia from an unknown cause before dying. CBS News and others state Rubio is responding to the case as a possible outbreak that involves local quarantines.
Outlets broadly align on the U.S. response—active monitoring and limited concern—while details about the Russian circumstances are presented through reporting about the institute worker’s illness and the “suspected” nature of the plague. The emphasis across sources remains on government awareness, quarantine measures, and the absence of confirmed escalation.
