WHO and US Press Russia for Answers After Siberian Lab Worker's Pneumonia Death

The World Health Organization and the United States are demanding more information from Russia following the death of a lab worker in Siberia from pneumonia of unknown origin, with President Donald Trump announcing plans to call Vladimir Putin. WHO chief Tedros Adhanom Ghebreyesus said on X that Russia has been asked for details on the pathogen and reports of a second ill employee, while offering technical support. The 28-year-old researcher died Friday in Shelekhov; Russian authorities ruled out plague but cited "pneumonia of unknown origin." The case has sparked speculation about possible pneumonic plague from an accidental lab release, though Russian officials say no dangerous pathogens were found in contacts. Pneumonic plague, caused by Yersinia pestis, is treatable with early antibiotics.