HPV, the hidden STD - Has YOUR child been vaccinated? http://www.hpvhometest.com/merck-gardasil-has-y... HPV, Human Papillomavirus is a sexually transmitted disease that if left untreated can cause cancer of the cervix. A vaccine is availble to block the disease. In a controversial move, many states are mandating the use of this vaccine for schoolgirls age 13-18. Opponents say that it promotes promiscuity and takes away their control of their children. Proponents for the vaccine claim it's a way to protect children using a vaccine the same way it's done for other deadly diseases.