Cause of death in Russian pneumonia case still unknown, World Health Organization says

The World Health Organization (WHO) has stated it cannot independently confirm the cause of death for Darya Shipilova, a 28-year-old lab worker in Siberia. While initial unconfirmed reports suggested pneumonic plague following a lab accident, Russian authorities classified the death as pneumonia of an undetermined etiology after testing negative for high-threat pathogens. Nearly 200 contacts were quarantined, though none have tested positive for illness. The WHO continues to seek further details, noting that a laboratory-associated exposure cannot be fully excluded.

The World Health Organization (WHO) has stated it cannot independently confirm the cause of death for Darya Shipilova, a 28-year-old lab worker in Siberia. While initial unconfirmed reports suggested pneumonic plague following a lab accident, Russian authorities classified the death as pneumonia of an undetermined etiology after testing negative for high-threat pathogens. Nearly 200 contacts were quarantined, though none have tested positive for illness. The WHO continues to seek further details, noting that a laboratory-associated exposure cannot be fully excluded.