This document provides information for parents about the HPV vaccine. It explains that HPV is the most common sexually transmitted infection and can cause cancers such as anal, penile, and throat cancers in males. The HPV vaccine protects against cancers caused by HPV and works best when given before exposure to the virus, between ages 11-12. The vaccine is safe and has minimal side effects like pain or fainting. It is recommended that boys receive all three doses to be fully protected from HPV-related cancers.