I think I have been over this a few times, not sure you were one I mentioned it to. Viruses come from nature, you can not prove a virus until you replicate the virus from things in nature. Like eye of newt type experiments until what they have is an exact replication of the virus behavior. They do that through a process called splicing, only it isn't spelled the same way, it uses an acronym of letters. It took decades to perfect splicing techniques to a point where you could not tell there was human interference observing it under a microscope. That was a vital aspect if, per se, they wanted to set off a pandemic that had a lot of variants, as each variant could not show any human interference of being spliced together.