HPV (Human papillomavirus)

Adolescent Vaccination Recommendation:
Routine administration is recommended for females and males between 11-12 years of age, but the vaccine series may be started at 9 years old. Vaccination is also recommended for females aged between 13-26 and males aged between 13-21 years of age, who have not been vaccinated, or have not yet completed the series. 
About human papillomavirus 

Human papillomavirus (HPV) is a group of more than 100 viruses that are usually spread through sexual contact. HPV has been associated with cervical cancer and anogenital cancers such as cancer of the vulva, vagina, penis, and anus. Some studies also support a role of genital types of HPV in non-genital cancers including oral cavity and throat cancers. 

Visit the HPV Resource Center for additional tools & information.

UPDATE: On February 27, 2015, the Advisory Committee on Immunization Practices (ACIP) updated the HPV vaccine recommendation to include use of the 9-valent HPV strain vaccine. The new vaccine targets five additional strains of HPV, which adds protection against 14% of additional HPV cancers in women and 5% of additional HPV cancers in men. Due to the recent recommendations change, note that the resources below may not reflect the most current recommendations.