Chinese virologist Yan Limeng, who secretly fled to the United States from Hong Kong in April, revealed that the Chinese Communist Party (CCP) and the World Health Organization (WHO) worked together to conceal evidence of the potential spread of the novel coronavirus among humans when the outbreak first emerged in the central Chinese city of Wuhan in late 2019.

Yan was a researcher in virology and immunology at the University of Hong Kong’s school of public health. Fearing that her life may be in danger, Yan fled to the United States on April 28.