Since they have a unique number which is on the Vax card, it is entirely possible that different groups are getting different doses and/or saline.
A real human double blind/placebo type trial would have a control group that would not receive the actual drug/injection.
So maybe they are doing that, and also experimenting with varying doses could be possible.
Knowing the possible games they could be playing with the jab is so infuriating. Crimes against humanity and so many conservatives we know just rolled up their sleeve.