It depends. If you know your child is not sexually active, then why give them a vaccine.
If the risks for the vaccine is high, and the benefits low then why give a child the vaccine.
If the vaccine has not been tested much on children, then why give them the vaccine.
Also, I absolutely would not make it mandatory because HIV is not an airborne disease. I can go into a room with a person with HIV and not catch it. Other illnesses like measle, you only have to be in the room with someone to catch it.
Let's face it - we are not getting the whole story once again. HPV and HIV are linked in one respect - risky sexual behavior by the individual - which only fools dare not define. If 12-year girls who aren't sexually active, and don't want to be sexually active, are forced to have this vaccine, where is the "informed consent"? Will they be told exactly what and why they need the vaccine? Will they be told that sexual promiscuity is a leading cause of contracting HPV? Will they be told what sexual promiscuity means? No - that would be judgmental. We protect our dogs better than we do our children.