Advertisement

Which virus strains does the HPV vaccine protect against?

Clinical trials have shown that both Gardasil and Cervarix are safe and 100% effective in preventing HPV strains 16 and 18, which cause 70% of cervical cancers. Gardasil is also 99% effective in preventing HPV strains 6 and 11, which cause about 90% of genital wart cases. Both vaccines are given in three injections over six months. Although both Gardasil and Cervarix prevent two of the most serious high-risk HPV strains in women not previously exposed to them, they do not protect against all cancer-causing strains, so the U.S. Food and Drug Administration (FDA) recommends continued screening with regular Pap tests.
UCLA gynecologic oncologist Sanaz Memarzadeh, M.D., Ph.D., notes that although the human papillomavirus (HPV) vaccine is aimed at only two of HPV’s cancer-causing subtypes, recent studies suggest that it may also carry some protective benefit against other strains that share its key genetic elements. Because the HPV vaccine does not prevent all cervical cancers, women are strongly urged to continue obtaining regular Pap smears even if they have been vaccinated.

Continue Learning about HPV

Kids and Teens Hit the Jackpot With HPV Vaccine
Kids and Teens Hit the Jackpot With HPV Vaccine
In October, 2015 a group of 11 women working at the Canada Post won a $9 million lotto jackpot. And when the HPV (human papilloma virus) vaccine was a...
Read More
What are human papillomaviruses (HPV)?
Riverside Women's HealthRiverside Women's Health
Human papillomaviruses (HPVs) are a group of more than 100 related viruses. They are called papillom...
More Answers
How many types of Human papillomaviruses (HPV) are there?
 Dr. Diane Harper Dr. Diane Harper
There are about 140 different types of HPV. The families are tissue specific. For example, HPV 2 and...
More Answers
Is There a Cure for HPV Disease?
Is There a Cure for HPV Disease?

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.