Vaccines have - as far as I can tell - resulted in overwhelmingly positive outcomes. But all vaccine population models account for negative consequences. What really matters is whether a given vaccine rollout falls within those expected parameters. Could obviously dive into the nuance of this... But it's worth calling out is the oddness of the statement about "100% certain" given the context of this post and the broader issues it covers. By the way, if you wanna dive deeper into the specific ops trust in the governance of tech, TIGtech did some wonderful work here: https://www.tigtech.org/