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HPV vaccine: Who needs it, how it works

What does the HPV vaccine do?

Various strains of HPV spread through sexual contact and are associated with most cases of cervical cancer. Gardasil 9 is an HPV vaccine approved by the U.S. Food and Drug Administration and can be used for both girls and boys.

This vaccine can prevent most cases of cervical cancer if the vaccine is given before girls or women are exposed to the virus. This vaccine can also prevent vaginal and vulvar cancer. In addition, the vaccine can prevent genital warts, anal cancers, and mouth, throat, head and neck cancers in women and men.

In theory, vaccinating boys against the types of HPV associated with cervical cancer might also help protect girls from the virus by possibly decreasing transmission.