Misleading health content has racked up an estimated 3.8 billion views on Facebook over the past year, peaking during the COVID-19 pandemic, advocacy group Avaaz said in a new report on Wednesday.

Social media platforms have removed clips of Judy Mikovits, a discredited scientist, over her potentially harmful coronavirus advice.

Yuan Zhiming, professor at WIV and the director of its National Biosafety Laboratory, said "malicious" claims about the lab had been "pulled out of thin air" and contradicted all available evidence.