Just to say somthing on this,
I'm honestly against it. For a number of reasons, a few being that right now schools are in a bind to have enough money around to get text books much less a multimillion doller contract for an immunization against somthing that is generally transmitted off of school facilities. To mandate that "you must have this shot so you don't get cancer in 20 odd years from screwing your boyfriend" feels like the school is leaving is purview of making sure your kids get a good education and instead the principal is trying to get kickbacks from a drug company if he can get this to catch on nation wide.
Yes as kids we are vaccinated against disease but generally these diseases would strike while we were still children and are highly contagious so that if we had it and didn't know it we'd infect several children (possibly killing them) before we were finially diagnosed and taken to the hospital. If it was a vaccination for somthing like say, SARS i'd go for it because SARS is spread EXTREMLY easily. Meanwhile an STD requires a illicit copulation between two underage children who would probably be consenting to this.
Walsh... Your wrong (according to wiki) the versions of HPV that cause cervical cancer are sexually transmitted only. HPV is actually a group name for about 100 virus's that work in similar ways.
However I think that this should be taken into consideration