One thing I've been wondering about this AstraZeneca clot question is just how common might it be? What we hear about are those cases who have had symptoms bad enough to be hospitalized. No doubt this is occurring on a spectrum of severity, from not at all to, well, death. What about those blood abnormalities that aren't noticed or documented at all? Could this result in long term or delayed effects that will perhaps never be tied to the vaccine?

Good questions. Then there's the push to multiply all of the above by making these novel vaccines a perennial thing - just like the flu shot.

What we do know is there is we can't rely on the experts to divulge full information about Covid - 'due to Covid'.