The WHO called for more details after a worker at a Siberian plague lab died of pneumonia, despite Russia saying her death was unrelated to plague and posed no epidemic risk ▻ ↧ What do we know so far about plague institute lab worker's death in... A laboratory worker at a plague research institute in Siberia fell ill and died in undisclosed circumstances on October 2, prompting authorities to initially quarantine about 200 people and causing public health fears on social media.