Chinese virologist Qiu Xiangguo was escorted out of the Canada's National Microbiology Laboratory (NML) in Winnipeg, Canada on July 5 for the alleged "policy breach", Canadian media reported on Sunday.

Technicians in a microbiology laboratory [File photo: IC]

Dr. Qiu was removed from the laboratory along with her husband and an unknown number of her students by Canadian intelligence.

Qiu is an internationally well-known virologist who helped develop ZMapp, a treatment for the deadly Ebola virus with her colleague Gary Kobinger.