<p class="wp-block-paragraph">The World Health Organization (WHO) stated on Saturday that it cannot independently confirm the cause of death of a 28-year-old Russian woman, Darya Shipilova, who worked at a lab studying plague and other diseases.</p>
<p class="wp-block-paragraph">Shipilova died on October 2, prompting the quarantine and medical observation of nearly 200 Russian citizens two days after her hospitalization at the Irkutsk Anti-Plague Research Institute in Siberia. Rospotrebnadzor, Russia's public health regulator, reported that initial laboratory results for all identified contacts were negative, and none exhibited signs of illness. An unconfirmed report suggested that Shipilova became ill after accidentally breaking a vial in the laboratory.</p>
<p class="wp-block-paragraph">The Moscow Times noted that media reports described the suspected infection as pneumonic plague, raising global concerns about a potential outbreak on social media. The COVID-19 pandemic has increased global health leaders' focus on laboratory leaks since the virus emerged in Wuhan, China, in 2020.</p>
<p class="wp-block-paragraph">WHO officials indicated on Wednesday that they were seeking more information from Moscow regarding the incident before releasing a statement on Saturday, which detailed their risk assessment and communications with Russian authorities.</p>
<p class="wp-block-paragraph">According to the WHO statement, "Based on the information provided by NFP, WHO has not identified evidence of ongoing transmission associated with this event." It also noted a key uncertainty regarding the absence of a confirmed diagnosis for the deceased laboratory worker.</p>
<p class="wp-block-paragraph">The statement continued, "Testing did not identify plague or other tested high-threat pathogens, and the death has been classified as pneumonia of an undetermined etiology. Given the absence of a confirmed diagnosis, WHO is not in a position to independently assess whether the duration of the reported monitoring period for contacts was sufficient to exclude all plausible causes of the fatal illness." WHO added that "a laboratory-associated exposure therefore cannot be fully excluded at this stage."</p>
<p class="wp-block-paragraph">Pneumonic plague, considered the most virulent form of plague, can spread through respiratory droplets. Outbreaks have largely been controlled since the 1990s, following significant fatalities during China's Manchurian Plague.</p>
<p class="wp-block-paragraph">Rospotrebnadzor later denied rumors of a second plague infection in Russia. U.S. authorities have requested more information from Moscow but stated that the incident does not pose a threat to American citizens.</p>