A Russian lab worker died on October 2 from pneumonia, prompting an investigation by the World Health Organization.
What happened
The World Health Organization has stated that it does not know the cause of the lab worker's death, but no cases of plague have been registered in the area.
The lab worker, Darya Shipilova, 28, worked at the Irkutsk Antiplague Research Institute in Siberia and died from pneumonia of unknown origin.
According to the WHO, test results were negative for high-threat pathogens, and no evidence of ongoing transmission associated with the event has been found.
Russian authorities have implemented preventive and control measures, including contact tracing, and have reported that the lab worker had been vaccinated and possessed immunity against the pathogens she worked with.
The governor of Irkutsk, Igor Kobzev, stated that some 5,000 lab tests were conducted as part of the response to the worker's death, and no infectious diseases were discovered.
