why do girls have to have a cervical cancer jab so early on in life ?

Question: why do girls have to have a cervical cancer jab so early on in life ?
- Keywords:
  cancer,
  disease,
  health
Asked by to Jess on 14 Mar 2014. This question was also asked by .
- Jess Smith answered on 14 Mar 2014:
  
  The jab is actually protecting you against the viruses which can then cause cervical cancer. These viruses are very common, so the earlier you get the jab the less likely you are to have been exposed to these viruses already.

Question: why do girls have to have a cervical cancer jab so early on in life ?