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axolotl_peyotl 1 point ago +1 / -0

The antibody tests are a solid phase type assay

FDA reverses itself, rejects COVID antibody test results: "Results from SARS-CoV-2 antibody tests should NOT be used to evaluate immunity or protection from COVID-19 at any time, esp. after the person received a COVID-19 vaccination."

Homopratensis2 2 points ago +2 / -0

They've flopped back and forth. The simple truth is there is no other practical way to establish immunity. Like re-defining herd immunity as only a very as a certain number of vaccinated people, the not using antibody tests for establishing immunity makes it so those who got covid and recovered can't use that to assert immunity.

Ironically this is after a year of doing antibody testing to established convalescent plasma donors...and plasma therapy worked somewhat.