CDC recommends that 11- to 12-year-olds receive two doses of HPV vaccine 6 to 12 months apart, Teens and young adults who start the series later, at ages 15 through 26 years, need three doses of HPV vaccine.
What are the possible side effects?
Pain, redness, or swelling in the arm where the shot was given.
Fever
Dizziness or fainting (fainting after any vaccine, including HPV vaccine, is more common among adolescents than others).