And the people who *thought* they had covid because the test was a false positive really had the flu and had no antibodies to omicron.
Most likely any friend who thought they had covid based on a test result and later came down with covid probably never had it earlier.
I considered that but each of the people I know who had Alpha (and then got Omicron) lost their sense of smell suddenly and completely when they had Alpha and got it back weeks later. Nothing like that has ever happened to anyone I know who got a flu of any kind. Alpha has a very specific impact on the olfactory process that a normal flu does not have.