Could a virus have escaped from the P4 laboratory in Wuhan?

Around sixty countries are now calling for an independent investigation into the source of the contagion. How did this ultra-secure research center, built on the model of the Jean-Mérieux center in Lyon, become the object of all fantasies and tensions?
Why did French researchers entrust their know-how to their Chinese counterparts before abandoning the collaboration?
Have we lost control of P4 to the Americans, who have never stopped exchanging with the leaders of Wuhan? Investigation into a very opaque lab.
Director: Camille Le Pomellec