Does hpv vaccination confers lifelong immunity? some journal says it is only for 5 years

HPV vaccine: Both Gardasil and Cervarix prevent cervical dysplasia from high-risk hpv types 16 and 18 and some protection against a few other high-risk hpv types. Other high-risk hpv types are not affected by the vaccines. The protection against hpv 16 and 18 has lasted 5 years after vaccination for Gardasil and more than 6 years for Cervarix so far, but there does not appear to be a need for booster shots.