This narrative was established a couple of years ago. The science is remotely possible; if you trust CDC scientists.

What this testing does do is to:

Allows the CDC the opportunity to fabricate data from a small sample set without relying on 3rd party medical providers to support propaganda.

Eliminates the statistical problem of reduced data supply from people who no longer test for every slight sniffle.

Allows the CDC access to much of the country's water supply to add anything extra they want.