[tempestn]

Yes, the child is unable to give consent in that scenario, so we have an alternative, because the benefit is worth it. (We could wait until people are adults before subjecting them to any vaccinations, but that would cost a lot of lives.)

It's possible an intervention like this one could also save a lot of lives, and therefore might also warrant an exception from individual consent. (Or not; it would depend on the specific expected benefits and risks.)