I suppose the word own is rather problematic here. But since infants below 7 cannot speak for themselves parents are supposed to speak for the child, guiding the child on the road to become an upstanding citizen.

In some jurisdictions the laws governing parental powers have been amended to : "make it easier for CPS to insert their assistance", and CPS is elevated to a co-equal branch with parents.

So, by default, in these jurisdictions, in terms of health issues with kids, as a parent you are in a losing battle to protect your child from an uncessary mRNA vaccin (99,9% survival rate or there abouts), apart from the incessant brainwashing about this issue and peer pressure.

This directly interferes with the professed right of parents to raise their child according their their philosophical outlook in life. ( See: EVRM/ EU constitution on human rights)

In US terms, it would be called State Interests.

Children of 12 in many jurisdictions are very capable of making decisions where it concerns health. Like whether or not to take a bloodtransfusion. The older they get, the more self determination is presumed.

So, I would say: if you want to have any impact on your child's education, make sure to do so in the first 7 years. Pref: Homeschooling.