Wuhan lab leak theory: How Fort Detrick became a centre for Chinese conspiracies

A disinformation campaign claiming that the Covid-19 virus originated from an American military base in Maryland has gained popularity in China ahead of the release of a US intelligence report on the virus origins.

In May, US president Joe Biden ordered a 90-day probe into whether the Covid-19 virus came from a lab accident or emerged from human contact with an infected animal.

Until then, the "Wuhan lab leak" theory had been dismissed by most scientists as a fringe conspiracy theory.

But now as the report is due to be...