Does the HPV Vaccine Work If You Already Have HPV?

Yes, the HPV vaccine can still provide protection even if you already have HPV. The vaccine protects against multiple HPV strains, so if you're infected with one type, it can still prevent infection from other high-risk strains you haven't encountered. Clinical studies show the vaccine is effective against 9 different HPV types, including those responsible for 90% of genital warts and 70% of cervical cancers. The CDC recommends catch-up vaccination through age 26 for people who were not adequately vaccinated earlier. For some unvaccinated or incompletely vaccinated adults ages 27–45, vaccination may be considered after discussion with a clinician; it is not routinely recommended for everyone in this age group. Previous HPV exposure does not necessarily eliminate the potential benefit. Getting vaccinated after an HPV diagnosis may protect against vaccine-covered HPV types you have not already acquired. It does not clear or treat an existing HPV infection, prevent disease caused by that existing infection, or replace recommended screening and follow-up care.