HPV Vaccine: Complete Guide

Last Updated: February 18, 2026

The HPV vaccine is one of the most effective tools in preventing HPV-related cancers, including cervical, throat, anal, and other cancers. This comprehensive guide covers everything you need to know about HPV vaccination.

What is the HPV Vaccine?

The HPV vaccine is a safe and effective vaccine that protects against infection from human papillomavirus (HPV) types that cause the majority of HPV-related cancers and genital warts. Currently available vaccines include Gardasil 9, which protects against nine types of HPV.

These vaccines work by stimulating your immune system to produce antibodies against HPV. When you're exposed to the virus in the future, your immune system can quickly recognize and fight it off before it causes infection.

Who Should Get the HPV Vaccine?

Routine Vaccination

The CDC recommends HPV vaccination for all preteens at age 11 or 12 years. The vaccination can be started as early as age 9. Vaccination at this age produces a stronger immune response than vaccination at older ages.

Catch-Up Vaccination

All persons through age 26 years who were not adequately vaccinated earlier should receive HPV vaccination. Even if you've already been sexually active, the vaccine can still provide protection against HPV types you haven't been exposed to.

Adults Ages 27-45

Some adults ages 27 through 45 years who are not already vaccinated may decide to get HPV vaccine after speaking with their doctor about their risk for new HPV infections and the possible benefits of vaccination. While vaccination at this age provides less benefit, it may still be worthwhile for some individuals.

Vaccine Schedule

The number of doses needed depends on the age at which vaccination begins:

Two-Dose Schedule (Ages 9-14)

  • First dose: Initial visit
  • Second dose: 6-12 months after the first dose

Children who receive their first dose before their 15th birthday only need two doses.

Three-Dose Schedule (Ages 15 and Older)

  • First dose: Initial visit
  • Second dose: 1-2 months after the first dose
  • Third dose: 6 months after the first dose

Teens and young adults who start the series at ages 15 through 26 years need three doses.

Vaccine Effectiveness

HPV vaccination is highly effective in preventing infection with the HPV types covered by the vaccine. Studies have shown:

  • More than 90% effective at preventing HPV infections and cervical precancers caused by the HPV types covered by the vaccine
  • Nearly 100% effective at preventing genital warts when given before exposure to HPV
  • Real-world data shows dramatic reductions in HPV infections, cervical precancers, and genital warts in countries with high vaccination rates
  • Protection appears to be long-lasting, with studies showing effectiveness for at least 10-15 years, and likely much longer

Safety and Side Effects

HPV vaccines have been extensively studied and monitored for safety. More than 135 million doses have been distributed in the United States since 2006, with an excellent safety record.

Common Side Effects

Most side effects are mild and include:

  • Pain, redness, or swelling at the injection site
  • Mild fever
  • Headache
  • Fatigue
  • Muscle or joint pain

These side effects typically resolve within a day or two and are similar to side effects from other vaccines.

Fainting

Fainting (syncope) can occur after any medical procedure, including vaccination, especially in adolescents. To prevent injuries from fainting, people receiving the vaccine should sit or lie down during vaccination and remain seated for 15 minutes after getting the shot.

Serious Side Effects

Serious side effects from HPV vaccine are very rare. The benefits of vaccination in preventing cancers far outweigh any potential risks.

Why Vaccination at Young Ages?

The HPV vaccine is most effective when given before any exposure to HPV. Here's why preteens are the ideal age group for vaccination:

  • Better immune response: Younger individuals produce more antibodies in response to the vaccine compared to older individuals
  • Protection before exposure: Vaccination before potential exposure to HPV through sexual activity provides maximum protection
  • Fewer doses needed: Children who start vaccination before age 15 only need two doses instead of three
  • Cancer prevention: Protecting children now prevents cancers that could develop decades later

Common Questions and Concerns

Does the vaccine encourage sexual activity?

No. Multiple studies have shown that HPV vaccination does not lead to earlier initiation of sexual activity or increased sexual risk-taking behavior. The vaccine is simply a preventive health measure, like any other childhood vaccine.

Can the vaccine cause infertility?

No. There is no evidence that HPV vaccination affects fertility. On the contrary, by preventing cervical cancer and the need for treatments that might affect fertility, the vaccine protects reproductive health.

Do I still need screening if I'm vaccinated?

Yes. HPV vaccination does not replace cervical cancer screening. The vaccine does not protect against all HPV types that can cause cancer, and not everyone is vaccinated at the optimal age. Continue regular screening as recommended by your healthcare provider.

Can vaccinated people still get HPV?

HPV vaccines protect against the types of HPV that most commonly cause cancer and genital warts. However, there are other HPV types that the vaccine doesn't cover. While less common, these types can still cause health problems, which is why continued screening remains important.

How to Get the HPV Vaccine

HPV vaccines are available at:

  • Doctor's offices
  • Community health clinics
  • School-based health centers
  • Pharmacies (age restrictions may apply)
  • Public health departments

Cost and Insurance

Most health insurance plans cover HPV vaccination. The Vaccines for Children (VFC) program provides free vaccines to children who are uninsured, underinsured, or eligible for Medicaid. Adults without insurance can often find low-cost options through community health centers or public health departments.

Global Impact

Countries with high HPV vaccination rates have already seen remarkable results:

  • Australia: On track to virtually eliminate cervical cancer by 2035, with dramatic declines in HPV infections, cervical abnormalities, and genital warts
  • United Kingdom: Studies show an 87% reduction in cervical cancer rates among women who were vaccinated at ages 12-13
  • United States: HPV infections with vaccine-covered types have decreased by 88% among teen girls and 81% among young adult women

Take Action Today

HPV vaccination is a powerful tool in cancer prevention. If you or your child is due for HPV vaccination, talk to your healthcare provider today. Preventing cancer starts with protection against HPV.

For more information about where to get the HPV vaccine, visit our Resources page or contact your local health department.

Medical Disclaimer: This information is for educational purposes only and should not replace professional medical advice. Consult your healthcare provider about HPV vaccination and whether it's right for you or your child.