Cervical cancer is, among the gynecologic cancers occurring in women, one whose cause is comparatively clearly identified, and is therefore counted as a representative cancer that can be prevented. This is because most of the cause is human papillomavirus (HPV) infection. The message I always emphasize to patients in the clinic, and to my own family, is one: prevent HPV infection in advance, and prepare once more with a vaccine. In this article, focusing on prevention itself rather than screening, I will organize how cervical cancer can be prevented in advance, centered on the HPV vaccine.
The cause of cervical cancer is mostly HPV infection
The first fact to note when talking about cervical cancer is that this cancer almost entirely starts from infection with the virus called HPV. The World Health Organization (WHO) explains that almost all cervical cancer cases are associated with persistent infection of high-risk HPV. In other words, it means that preventing HPV infection can substantially reduce the occurrence of cervical cancer itself.
HPV has very many types, and some of them are the high-risk types that cause cancer. In particular, types 16 and 18 are reported to be related to a considerable part of cervical cancer worldwide. It is also worth knowing that in our country, after type 16, infections with types 52 and 58 are reported comparatively commonly. This is because the meaning of vaccine choice also changes depending on which subtypes are common.
HPV is a virus so common that anyone with sexual experience can encounter it at least once. Infection itself does not immediately mean cancer, and most disappear naturally. However, when a high-risk type remains for a long time it can become a problem, so prevention is important.
If you want to know more about how HPV is confirmed and managed by which test, we recommend reading together the article organizing HPV testing and management. That infection does not immediately lead to cancer can also be confirmed in the answer to whether having an HPV infection necessarily leads to cervical cancer.
The HPV vaccine blocks the path to cancer in advance
The HPV vaccine aims to prevent infection by the high-risk-type virus that causes cervical cancer. The key is that it is 'prevention,' not 'treatment.' The vaccine is not a drug that eliminates already-formed lesions, but a means to block future infection and lower the very possibility of progression to cancer.
The 9-valent vaccine widely used now broadly includes HPV types 31, 33, 45, 52, and 58, in addition to types 6, 11, 16, and 18. Types 16 and 18 are known as the subtypes most deeply related to cervical cancer, and the 9-valent vaccine is meaningful in that it encompasses here types 52 and 58, which are common in our country. The Korean Society of Gynecologic Oncology has guided that even women who have already received the 2-valent or 4-valent vaccine can consider an additional 9-valent vaccination to block more subtypes (2024).
However, since the vaccine does not block all high-risk types 100%, regular screening is still needed even after vaccination as it is. You can understand the vaccine and screening not as a matter of choosing one of the two, but as two axes that go together.
Who, and when, is it best to get it
It is a consistent recommendation that the earlier the vaccine, that is, the earlier it is received before exposure to HPV, the greater the preventive effect. So many countries set adolescence, before the start of sexual experience, as the standard vaccination period.
In our country too, the Korea Disease Control and Prevention Agency operates national vaccination support targeting female adolescents of a certain age and low-income women (as of 2024). Since the target age and detailed conditions are updated each year, it is accurate to check at a public health center or medical institution whether you or your child is a target for free vaccination.
| Category | General meaning of vaccination | Points to consider together |
|---|---|---|
| Adolescence (before exposure) | Standard recommended period, the preventive effect is reported to be greatest | Check whether eligible for national support |
| Up to mid-20s | If missed, consider catch-up vaccination | Sometimes recommended regardless of sex |
| Adults after 27 | Not a uniform recommendation but discussed by individual situation | Consider new infection risk and prior exposure |
The US ASCCP regards ages 9 to 26 as targets for standard and catch-up vaccination, and recommends that adults from 27 to 45 decide by discussing the individual's infection risk together with the medical staff (2025). This is because, as one gets older, there is a possibility of already having been exposed to some subtypes, so the expected benefit can change. In the clinic, many people ask "is there any meaning in getting it even though I'm married?"—but even with experience of exposure, if there are still subtypes not yet encountered, it is worth discussing.
If you are unsure which period and which vaccination is right for you, get a consultation on the HPV vaccination timing
Even if you have already had sex or been infected, it is not too late
One of the most common misconceptions is the thought "since I already have sexual experience, the vaccine is useless." That is not so. HPV has several subtypes, so even if you have been exposed to one subtype, you may not yet have encountered other high-risk types. The vaccine can be expected to have a preventive effect against subtypes you have not yet been infected with.
Likewise, those for whom HPV was detected in the past can also consider vaccination. This part is covered a bit more specifically in the guide on whether you can get the HPV vaccine even after already being infected. However, since the vaccine cannot treat already-formed lesions, if there is a detection history, regular follow-up is needed together, separately from vaccination.
In clinical experience, not a few people give up on the vaccine for the reason "an abnormal result came out once before." But the more so, the more important it becomes to block future new infections. It is good to organize, through a medical visit, which choice is appropriate together with your test history.
It does not end with the vaccine alone—screening and lifestyle management together
The vaccine is a powerful axis of cervical cancer prevention, but with that alone, not all risk disappears. As said earlier, since the vaccine does not include all high-risk types, regular cervical cancer screening is still needed regardless of whether you are vaccinated.
- Vaccination reduces major high-risk-type infections in advance.
- Regular screening confirms early subtypes the vaccine cannot block or changes that have already formed.
- Lifestyle management such as smoking cessation reduces additional risk factors.
The importance of screening is covered in detail in the reason you must receive cervical cancer screening, so we recommend understanding prevention and screening as one bundle. The vaccine and screening are not in a competitive relationship but a complementary one that fills each other's gaps.
Organizing frequently asked questions
When vaccination is recommended in the clinic, similar questions recur. Let me gather a few and organize them briefly.
First, there are many questions of "if I get it once, does it last a lifetime?" The WHO has recently been reviewing and introducing a single-dose schedule for some vaccines (2022-2024), but the recommended number of doses and schedule differ depending on age, vaccine type, and country-specific policy. Therefore, it is accurate to check the schedule that suits you at a medical institution.
Second, the question "should men get it too?" is also often received. HPV is transmitted regardless of sex, and there is a trend, domestically and abroad, of recommending vaccination regardless of sex. It is meaningful information for those considering prevention at the family level too.
Third, to the question "since I got the vaccine, do I not need screening?", we answer clearly. That is not so. Even after vaccination, you must maintain regular screening as it is.
Cervical cancer is a cancer whose path to prevention is comparatively well known. If you take care of two things together—reducing infection in advance with the HPV vaccine and confirming changes early with regular screening—you can prepare sufficiently. Do not be too afraid, but do not put it off either. If you are unsure about the vaccination timing or type, you can organize a prevention plan suited to your situation together through consultation.
Written by: Lee Dong-hee Director · Obstetrics and Gynecology Specialist · View medical staff profile
First published March 15, 2024 · Last reviewed May 30, 2026
References: World Health Organization WHO HPV Vaccination Recommendations (2022, 2024), US ASCCP HPV Vaccine Recommendation Statement (2025), Korean Society of Gynecologic Oncology 9-valent vaccine recommendation (2024), Korea Disease Control and Prevention Agency HPV National Vaccination Support Guide (2024)
This article is intended to provide general health information and does not replace individual diagnosis or treatment. If you have symptoms, please consult through a medical visit.