The vaccine will possibly boost the immune system to fight any existing HPV viruses. Or at least that seems logical. Seems that people who have had Covid already still get added immunity after the vaccine. I am 75 years old and have HPV caused base-of-tongue squamous cell carcinoma. I intend to get the HPV vaccine despite my advanced age. I must wait until the treatment is complete and my immune system is once again normal.
Maybe it will do nothing for me. But if it does, avoiding a future bout of radiation/chemo treatment will be well worth it! Something to think about.