If you remember, there was a news blip about Trump refusing to use a very early batch of test kits. Trolls and subcontractors were out on the forums shopping the talking points. It was revealed early that something like 50% of them were faulty, both false positives and false negatives. It was like the tests were random. In order to confuse and beat low level agencies, and get doctors to accidentally kill patients with other problems - you need false positives. To let the virus spread out of control, you need false negatives. This is about control.