Well, good point. It's not a solid source, could be BS, but on the other hand isn't hard to believe since we DO know that many pilots are vaxxed (many were required to be) and Sudden Death HAS happened to at least a few pilots in the air -- and of course sudden death, fainting, and other rapid-onset disability has happened to a great many people post-vax. So as with anything, keep some skepticism, but again: certainly plausible.