HPV Vaccine Schedule: How Many Doses You Need and When

You booked the HPV vaccine for yourself or your child, and now you are staring at a calendar wondering: is it two shots or three? How far apart? Did we wait too long between doses? The good news is that the schedule is simpler than it looks, and it mostly comes down to one thing: the age at which you start.

Here is a clear, age-by-age breakdown of the HPV vaccine schedule, how the doses are spaced, and what to do if life got in the way and you fell behind.

What is the HPV vaccine schedule?

The HPV vaccine schedule is the recommended number of doses and the timing between them to build full, lasting protection. The CDC recommends routine HPV vaccination at age 11-12, and the series can be started as early as age 9. Catch-up vaccination is recommended through age 26 for anyone who was not fully vaccinated earlier.

The number of doses you need is not the same for everyone. It depends on how old you are when you get your first shot. Starting younger means fewer shots, because a young person's immune system responds especially strongly to the vaccine.

How many doses do I need? (2-dose vs 3-dose)

The schedule splits into two paths based on the age at your first dose:

• Start at ages 9-14: a 2-dose series, with the doses given 6-12 months apart.
• Start at ages 15-26: a 3-dose series, given over 6 months on a 0, 1-2, and 6 month schedule.
• Immunocompromised, including people with HIV: a 3-dose series at any age, even if started at ages 9-14.

How far apart should the doses be?

For the 2-dose schedule, the two shots are typically spaced 6-12 months apart. The minimum interval between dose 1 and dose 2 is 5 months. If the second dose is given sooner than that, an additional dose may be needed for the series to count as complete.

For the 3-dose schedule, the shots follow a 0, 1-2 month, and 6 month pattern. The vaccine used today, Gardasil 9, is FDA-approved for males and females ages 9-45, and it protects against genital warts and most cervical, vaginal, vulvar, penile, anal, and oropharyngeal (mouth and throat) cancers caused by HPV.

What if I am 27 to 45, or I missed doses?

If you are between 27 and 45 and were not vaccinated earlier, routine catch-up is not automatically recommended. Instead, the CDC's advisory committee recommends shared clinical decision-making: you and your clinician weigh your individual risk of a new HPV infection and the potential benefit. The American College of Obstetricians and Gynecologists supports this same approach. HPV vaccines are not licensed for use beyond age 45.

If you started the series but missed a dose, you usually do not need to restart from scratch. The series can typically be resumed where you left off. A clinician can confirm how many more doses you need based on your age at the first dose and the spacing so far.

Why the schedule matters

Completing the full schedule is what gives you the durable protection the vaccine is designed for. The HPV vaccine prevents more than 90% of HPV-attributable cancers, which is a remarkable level of protection for a few well-timed shots.

Many people still fall short. In 2024, 78.2% of U.S. adolescents aged 13-17 had received at least 1 HPV dose, but only 62.9% were up to date with the full series. That leaves HPV coverage below other routine teen vaccines like Tdap (91%) and MenACWY (90%) - largely because people start the series and do not finish it.

When to talk to a clinician

Talk to a clinician if you are unsure how many doses you have had, whether your spacing was correct, or whether you fell outside the recommended interval. They can review your records and tell you exactly what is left to complete the series.

This is general education, not personal medical advice. A clinician can build a plan around your age, your vaccination history, and your individual risk, and a tool like Nolla can help you connect with one for personalized guidance.