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"The NIH decided the risk was worth it. In a potentially fateful decision, it funded work similar to Baric’s at the Wuhan Institute of Virology, which soon used its own reverse-genetics technology to make numerous coronavirus chimeras. Unnoticed by most, however, was a key difference that significantly shifted the risk calculation. The Chinese work was carried out at biosafety level 2 (BSL-2), a much lower tier than Baric’s BSL-3+."

https://www.technologyreview.com/2021/06/29/1027290/gain-of-function-risky-bat-virus-engineering-links-america-to-wuhan/