Can you come up with any evidence for this or any other human disease being man made?"Researchers" stole it.
Pretty much why the Chinese make it a priority to have "students" and "professors" and "researchers" at pretty much every "educational" or other institution they can. Often Dual Citizens who are Commie lovers at heart.
There are many Chinese graduate students and postdocs in American labs simply because they are more willing to work the long hours for little pay that such positions entail. It’s not a plot. Their educational system is better than ours on average (some of this is just due to the cultural values related to academic achievement).