Interesting, but I don't see how this would be beneficial to "them". I don't think they are straight up trying to kill us, but rather control/enslave us. Sterilization doesn't control us unless there was some way to undo it that was unreachable for the commoner. ADE/autoimmunity makes the most sense. You become dependent on pharma to live.
I'm aware of PZP, I was not aware of it's schedule. Sterilization has been my number one suspect since the start, they haven't stopped talking about eugenics and population control since the 20s. This would explain the seeming desperation to get everyone jabbed within a specific timeframe.