Level 4 labs are built to work with extremely infectious pathogens that, if released, could cause immense damage. Qiu was head of the vaccine development and antiviral therapies section in the special pathogens program at the lab. Dr. Xiangguo Qiu, seen here in an undated image from a CBC segment, at the National Microbiology Laboratory (NML) in Winnipeg. O'Toole called PHAC's ongoing refusal to provide more details about this incident a "deeply troubling cover-up." The Wuhan lab that received those pathogens from Canada is now the focus of a World Health Organization (WHO) probe into the origins of COVID-19.

Source: CBC News June 01, 2021 15:45 UTC