how high security labs work

"Let us understand that the absolute way of preventing the infection is that the infectious agent does not reach where it can breed or multiply. This would be almost like sealing yourself from outside contact. That is how high security labs work. Here too accidental leakage or escape of these very tiny agents is a dreaded possibility. The theory that this happened from a top end Chinese lab is not impossible."

Courtesy - Vinod Dawda, Microbiologist