I don't know how you can "deliver" such snark; if you gave 100 people shots and 30 developed clots, by your erroneous reasoning, N = 30.

What matters is the number of clots relative to the normal (incidence) rate, and the odds that you'd find 30 clots when sampling a randomized size-matched subset of the total population.

Please don't try to talk with authority on a topic when you're undereducated, aside from coming across as an ass, your brazen confidence and lack of knowledge just gives room to counter-argue that would instead harm your supported causes.