Make it contagious in human.

In the Wuhan Institute of Virology, a scientific laboratory controlled by the Chinese state，Scientists have been experimenting on，coronaviruses for almost two decades，Such research is always dangerous，But these experiments were especially so，So one of the things you know they were doing for sure and they were doing in Wuhan was gain of function.
You heard a lot about that but that basically means is that，you taking naturally occurring virus that you would find in nature，And you engineer it. You mess with it and you make it contagious in human.