HPV vaccine and adolescents' sexual activity :

"The vaccine must be given before HPV infection is acquired. It is most likely to be recommended for 11-12 year olds, because by the ninth grade (age 14-15) 28% of girls in the US are sexually active. This has prompted some advocates of premarital abstinence to charge that HPV vaccination will condone or promote sexual promiscuity. However, its impact will probably be small because multiple factors are associated with initiation of sexual activity; fear of sexually transmitted infections is not a major reason for abstinence, and condom availability programmes have not been associated with behavioural disinhibition."

This is coming soon on the NHS!