Surprise!
China has used Covid-19 testing kits to collect the DNA of a large amount of people from all around the world.
Now China can more easily create diseases that target their enemies specifically while minimizing the effect on their own citizens.
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source:
https://www.dni.gov/files/NCSC/documents/SafeguardingOurFuture/NCSC_China_Genomics_Fact_Sheet_2021.pdf