China claimed not to have coronavirus samples at WIV but internet sleuths found proof that they did
China also claimed the mine workers died of a fungus but Twitter sleuths found links to papers on Chinese medical sites discussing that it was a new form of SARS.
Also China already knew what viruses COVID was linked to right from the outset of the pandemic and sleuths found WIV had previously uploaded genetic sequences of those related viruses to research sites
Just before the outbreak China uploaded videos showing off its cutting edge virology work, and the videos depicted researchers handling vials of highly contagious virus without wearing any protective equipment.
Finally the data collection that contains the genetic information about the viruses WIV handles was always publicly online until just before the pandemic began, when it was mysteriously taken offline. China claimed it was down because of cyber attacks on the lab following COVID, but Twitter sleuths found it was taken down before anyone (outside China) knew about COVID.
Pretty clear what happened.
https://www.newsweek.com/exclusive-how-amateur-sleuths-broke-wuhan-lab-story-embarrassed-media-1596958
Exclusive: How amateur sleuths broke the Wuhan Lab story and embarrassed the media
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https://www.newsweek.com/china-state-media-says-country-must-prepare-nuclear-war-us-after-biden-asks-covid-probe-1596568