[theultdev]

Your guardians consented to the shots because your brain wasn't developed enough to make your decision.

For mosquitoes, nature doesn't require consent, but humans are put on another standard.

Or do you think that because nature does something, humans are free to do it to themselves, like murder?

A wild bear will kill you, so therefore a human can kill another human right?

[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.)