The <abbr title="Centers for Disease Control and Prevention">CDC</abbr> recommends that all 11- and 12-year-olds receive two doses of <abbr title="human papillomavirus">HPV</abbr>
vaccine at least six months apart. Younger adolescents ages 9 and 10
and teens ages 13 and 14 also can receive vaccination on the two-dose
schedule. Research has shown that the two-dose schedule is effective for
children under 15.
Teens and young adults who begin the vaccine series later, at ages 15 through 26, should receive three doses of the vaccine.
The <abbr title="Centers for Disease Control and Prevention">CDC</abbr> recommends catch-up <abbr title="human papillomavirus">HPV</abbr> vaccinations for all people through age 26 who aren't adequately vaccinated.
The U.S. Food and Drug Administration recently approved the use of
Gardasil 9 for males and females ages 9 to 45. If you're age 27 to 45,
discuss with your doctor whether he or she recommends that you get the <abbr title="human papillomavirus">HPV</abbr> vaccine.
https://www.mayoclinic.org/diseases-conditions/hpv-infection/in-depth/hpv-vaccine/art-20047292