What does it even supposed to mean? The lab theory is not that humans conspired to spread the virus, but it happened due to negligence. What's happening then is a cover-up, not a conspiracy.

Cover-up is the default mode of handling failure in an aspiring Communist state. When a major accident happens that can be covered up, it will be covered up.

The above mentioned Sverdlovsk outbreak was presented as natural as well: the official culprit was cough a wet market nearby cough. Took 13 years and the dissolution of USSR to admit the cover-up.