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Several WIV researchers were ill in Fall 2019 with symptoms; some of their symptoms were consistent with but not diagnostic of COVID-19. The IC continues to assess that this information neither supports nor refutes either hypothesis of the pandemic’s origins because the researchers’ symptoms could have been caused by a number of diseases and some of the symptoms were not consistent with COVID-19. Consistent with standard practices, those researchers likely completed annual health exams as part of their duties in a high-containment biosafety laboratory. The IC assesses that the WIV maintains blood samples and health records of all of their laboratory personnel—which are standard procedures in high-containment laboratories.


 * We have no indications that any of these researchers were hospitalized because of the symptoms consistent with COVID-19. One researcher may have been hospitalized in this timeframe for treatment of a non-respiratory medical condition.


 * China’s National Security Commission investigated the WIV in early 2020 and took blood samples from WIV researchers. According to the World Health Organization’s March 2021 public report, WIV officials including Shi Zhengli—who leads the WIV laboratory group that conducts coronavirus research—stated lab employee samples all tested negative for SARS-CoV-2 antibodies.

While several WIV researchers fell mildly ill in Fall 2019, they experienced a range of symptoms consistent with colds or allergies with accompanying symptoms typically not associated with COVID-19, and some of them were confirmed to have been sick with other illnesses unrelated to COVID-19. While some of these researchers had historically conducted research into animal respiratory viruses, we are unable to confirm if any of them handled live viruses in the work they performed prior to falling ill.