The Irkutsk Aluminum Plant in Shelekhov mandated that its employees wear face masks as a precautionary measure following Darya Shipilova's death.

From the articleMystery death at Russian plague lab triggers sweeping precautions as US watches closelyAlso in Plague death triggers quarantine, mask mandates in Russia's Irkutsk region in Siberia, US ‘monitoring’ situation around suspected case of plague in Russia, Russian lab worker dies of suspected plague as hundreds placed in quarantine, Map Shows Countries Hit by Plague as Russian Lab Worker Dies, Russia takes steps after plague lab worker falls ill, "The U.S. is closely monitoring the situation" — Rubio issues statement following plague case in Russia | УНН, US closely monitoring case of lab worker who ‘possibly’ died of plague in Siberia, says Rubio, Dozens quarantined after researcher at Russian plague laboratory dies of ‘unknown’ infection | CNN