There is a reason for this. The COVID-19 strain was an accidental release; it had a far greater impact upon the Chinese than anyone else I believe. The reason is that they were adaptively selecting attack traits but they were actuating the virus to Chinese host DNA. It seems they realize this mistake now and are actively seeking American/European/Caucasian DNA samples to breed further strains.

The Chinese are actively pursuing their bio-weapons research against America while the Biden administration enables them.