Human papillomavirus, commonly called HPV, is a group of related viruses that spread through intimate skin to skin contact. Many people get HPV at some point in their lives, and most infections clear without causing health problems.
While some types of HPV are low risk and may cause warts, other high risk types can lead to cancers of the cervix, throat, and other areas. Understanding transmission, prevention, and screening helps people make informed choices about their health.
| Type | Cancer Risk | Common Conditions | Vaccine Protection |
|---|---|---|---|
| HPV 16 | High | Cervical, oropharyngeal | Covered |
| HPV 18 | High | Cervical, anal | Covered |
| HPV 6 | Low | Genital warts | Covered |
| HPV 11 | Low | Recurrent respiratory papillomatosis | Covered |
| HPV 68 | Moderate | Cervical, other anogenital | Partial coverage |
How HPV Spreads and Who Is at Risk
HPV transmits mainly through vaginal, anal, or oral sex with an infected partner. Skin to skin contact in the genital area can pass the virus even when a person shows no signs or symptoms. Because the virus is so common, most sexually active people will get HPV at some point, unless they are protected by vaccination.
Risk increases with multiple sexual partners or a history of other sexually transmitted infections. People with weakened immune systems may clear the virus more slowly and have a higher chance of lasting infection. Using condoms can lower the chance of HPV transmission, but they do not fully block skin contact in the genital area.
HPV and Cancer Development
High risk HPV types can cause cells in the cervix, throat, vulva, vagina, penis, and anus to change over time. Most infections clear within one to two years, but when persistent infection with a high risk type occurs, it may lead to cancer. Cervical cancer is most strongly linked to HPV, and regular screening can detect early cell changes before they become cancer.
Oropharyngeal cancers, which affect the back of the throat and base of the tongue, are increasingly associated with HPV, especially HPV 16. These HPV related cancers often do not cause symptoms until they are more advanced, which makes vaccination and awareness important.
HPV Vaccination Guidelines
Current health authorities recommend HPV vaccination for preteens around ages 11 to 12, with catch up vaccination through age 26. In some cases, vaccination may be recommended up to age 45 after a discussion with a healthcare provider. The vaccine is most effective when given before a person becomes sexually active and is exposed to HPV.
Three main types of vaccines have been used to protect against multiple HPV types, including those that cause most cervical cancers and genital warts. Side effects are generally mild, such as soreness at the injection site or mild fever. Vaccination does not treat an existing HPV infection but can protect against types the person has not yet acquired.
Screening, Testing, and Early Detection
Cervical cancer screening, such as Pap tests and HPV tests, helps find abnormal cell changes early in people with a cervix. Guidelines vary by age and past screening results, so it is important to follow the schedule recommended by a healthcare provider. HPV testing can identify high risk types that are more likely to cause cell changes, and it is often used alongside the Pap test.
There is no standard screening test for HPV in the throat, penis, vulva, or vagina for people without symptoms. Doctors may examine areas of concern and, if needed, take a small sample for further testing. Early detection through screening and prompt treatment of precancerous changes reduce the risk of developing invasive cancer.
Common Conditions Caused by HPV
Low risk HPV types, such as HPV 6 and 11, are the main cause of genital warts, which appear as bumps in the genital or anal area. Warts can be treated with topical medications, freezing, or other medical procedures, even though they are not dangerous. Recurrent respiratory papillomatosis, a rare condition where warts grow in the airway, can be linked to HPV 6 and 11.
High risk HPV can cause cell changes that, over many years, may develop into cancer if not monitored or treated. Most people with high risk HPV will never develop cancer, but regular checkups and recommended screenings help catch problems early. Overall, HPV related cancers are preventable through vaccination, screening, and awareness of symptoms.
Protecting Long Term Health
- Get vaccinated against HPV according to recommended age guidelines.
- Follow regular cervical cancer screening schedules if you have a cervix.
- Use condoms and reduce the number of sexual partners to lower exposure risk.
- Talk to a healthcare provider about HPV vaccination for adolescents and young adults.
- Seek medical evaluation for any persistent genital warts or unusual symptoms.
- Stay informed about personal risk factors and discuss them with a doctor.
FAQ
Reader questions
Can HPV be spread even when a person has no symptoms?
Yes, HPV can spread even when an infected person has no visible warts or other symptoms, because the virus can be present on the skin.
Is the HPV vaccine safe for people who are already sexually active?
Yes, the HPV vaccine can still protect against types the person has not yet been exposed to, so it is beneficial for many sexually active individuals.
How often should people with a cervix get screened for HPV and cervical cancer?
Screening schedules vary based on age, past results, and risk factors, so it is best to follow the recommendations of a healthcare provider.
Can HPV cause cancers other than cervical cancer?
Yes, HPV can cause cancers of the throat, anal, vulvar, vaginal, and penile areas, in addition to cervical cancer.