When you were vaccinated, did the nurse aspirate the needle?

This is major.   "Aspirate" means the plunger is pulled back briefly to see if the needle pulls up any blood.  Taiwan aspirates.  The USA and UK do not, and apparently Canada doesn't either.  The needle is supposed to unload into the deltoid muscle and avoid blood vessels.  The serious consequences of Covid-19 appear to be the result of virus spike protein being expressed by cells lining the blood vessels and then being counter attacked as aliens by the body's own defences.  Blood vessels go to the heart, they go to the lung, they go to the brain, you name it.

Illustrating aspiration 
detecting blood

A doctor reviews this.  Clearly risk of adverse consequences is higher if the needle penetrates a blood vessel and promptly distributes the mRNA for spike protein to all organs fed by the blood stream.