Well I guess the laws where I live are quite different to where you live. I don’t have the statistics but I imagine that a non-insignificant number of countries set the age of medical consent to a reasonable age at which people understand and have their own preferences as to the medical care they receive.
Do you think that children enjoy getting shots?
I said 12. 12 year olds can refuse vaccines (and those who do are not physically forced to, that sounds insane to me), in my experience at school when vaccines were offered at that age almost everyone opted to have them though.