Yet in computer simulations, the mutations in SARS-CoV-2 don't seem to work very well at helping the virus bind to human cells. If scientists had deliberately engineered this virus, they wouldn't have chosen mutations that computer models suggest won't work.

The coronavirus was not engineered in a lab. Here's ...

Yeah they could have made it as a vaccine... and this would not be the first time where mutations made a vaccine-virus turned into a killer.

Probably they were making a SARS vaccine and like the AZ one which used an adenovirus from chimps, they chose a bat one which they think is harmless.

CNN：世衛溯源小組報告 中國大規模採集動物樣本為重大疑點 - 國際 - 自由時報電子報