How many years can HPV vaccine prevent?

HPV vaccine can prevent cervical cancer and genitourinary warts. At present, HPV vaccine has been marketed for ten years, and vaccine titer test for people ten years after injection shows that the vaccine is still protective. According to mathematical models of titer decay, HPv vaccine can prevent for about 20 to 50 years, basically playing a good role in premenopausal protection. Therefore, in general, HPV vaccine, a person once in a lifetime is enough.