The World Health Organization (WHO) said on Saturday (the 10th) that Russia’s health regulator confirmed the death of a laboratory worker at a plague research center in Siberia and told the agency that no case of plague had been recorded.

A laboratory worker at a plague research institute in Siberia fell ill and died under undisclosed circumstances on October 2, prompting authorities to place about 200 people in quarantine and fueling concerns about public health on social media.

(Reporting by Gnaneshwar Rajan in Bengaluru)