winjim
Smash the cistern
It’s quite easy when 50m people have had it. Have the number of strokes statistically increased? No? Then the vaccine doesn’t cause strokes. Blood clots is an interesting one as covid causes blood clots so it’s not surprising that the vaccine might. That will be listed as a side effect and the risks are weighed against the benefits. As not having the jab increases you chance of getting covid (yes it does) then having the vaccine, even with the side effects, reduces your chances of a blood clot.
You'll notice I said 'especially at an individual level'. Population statistics don't always work for individuals.