Couldn't TLunaticsTB just add in a gene altering retrovirus to common vaccines?

I mean it would make for the perfect cover. You think your body is reacting to the vaccine when its really reacting viral vector changing your DNA.
I don't know someone could easily piggyback a viral vector inside a normal vaccine without anyone noticing. We all know of the preservatives and the mercury in the vaccines but what about other things that can be loaded in them without them telling you.

We know the new world order has population control as a planned goal. Could they create a retrovirus that could when triggered cause the target to be totally sterile or sick?

This type of bio-weapon could be a truly insidious geopolitical coercion tool. Just prevent the enemy from reproducing and wait them out.