On October 11, 2026, the World Health Organization (WHO) announced that it was unable to determine the cause of death of a laboratory worker from a plague research facility in Russia. According to the organization, the Russian state regulator reported negative test results for the deceased and individuals who had contact with her.
Test Results
The WHO received data indicating that all tests for dangerous pathogens conducted on both the deceased and her contacts returned negative. This means that no disease-causing agents were found that could have led to her death.
Condition of Contact Persons
Additionally, no symptoms have been observed in the contact persons, indicating that there is no threat to health. The WHO also reported that no other cases of severe pneumonia related to this situation have been identified.